block: remove bdrv_try_set_aio_context and replace it with bdrv_try_change_aio_context

No functional change intended.

Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20221025084952.2139888-11-eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

block.c

@@ -2904,7 +2904,7 @@ static void bdrv_attach_child_common_abort(void *opaque)
     bdrv_replace_child_noperm(s->child, NULL);
 
     if (bdrv_get_aio_context(bs) != s->old_child_ctx) {
-        bdrv_try_set_aio_context(bs, s->old_child_ctx, &error_abort);
+        bdrv_try_change_aio_context(bs, s->old_child_ctx, NULL, &error_abort);
     }
 
     if (bdrv_child_get_parent_aio_context(s->child) != s->old_parent_ctx) {
@@ -2975,7 +2975,8 @@ static BdrvChild *bdrv_attach_child_common(BlockDriverState *child_bs,
     parent_ctx = bdrv_child_get_parent_aio_context(new_child);
     if (child_ctx != parent_ctx) {
         Error *local_err = NULL;
-        int ret = bdrv_try_set_aio_context(child_bs, parent_ctx, &local_err);
+        int ret = bdrv_try_change_aio_context(child_bs, parent_ctx, NULL,
+                                              &local_err);
 
         if (ret < 0 && child_class->change_aio_ctx) {
             Transaction *tran = tran_new();
@@ -3065,7 +3066,7 @@ static void bdrv_detach_child(BdrvChild *child)
          * When the parent requiring a non-default AioContext is removed, the
          * node moves back to the main AioContext
          */
-        bdrv_try_set_aio_context(old_bs, qemu_get_aio_context(), NULL);
+        bdrv_try_change_aio_context(old_bs, qemu_get_aio_context(), NULL, NULL);
     }
 }
 
@@ -7407,13 +7408,6 @@ int bdrv_try_change_aio_context(BlockDriverState *bs, AioContext *ctx,
     return 0;
 }
 
-int bdrv_try_set_aio_context(BlockDriverState *bs, AioContext *ctx,
-                             Error **errp)
-{
-    GLOBAL_STATE_CODE();
-    return bdrv_try_change_aio_context(bs, ctx, NULL, errp);
-}
-
 void bdrv_add_aio_context_notifier(BlockDriverState *bs,
         void (*attached_aio_context)(AioContext *new_context, void *opaque),
         void (*detach_aio_context)(void *opaque), void *opaque)

block/export/export.c

@@ -129,7 +129,7 @@ BlockExport *blk_exp_add(BlockExportOptions *export, Error **errp)
 
         /* Ignore errors with fixed-iothread=false */
         set_context_errp = fixed_iothread ? errp : NULL;
-        ret = bdrv_try_set_aio_context(bs, new_ctx, set_context_errp);
+        ret = bdrv_try_change_aio_context(bs, new_ctx, NULL, set_context_errp);
         if (ret == 0) {
             aio_context_release(ctx);
             aio_context_acquire(new_ctx);

blockdev.c

@@ -1630,8 +1630,8 @@ static void external_snapshot_abort(BlkActionState *common)
                 aio_context_release(aio_context);
                 aio_context_acquire(tmp_context);
 
-                ret = bdrv_try_set_aio_context(state->old_bs,
+                ret = bdrv_try_change_aio_context(state->old_bs,
-                                               aio_context, NULL);
+                                                  aio_context, NULL, NULL);
                 assert(ret == 0);
 
                 aio_context_release(tmp_context);
@@ -1792,12 +1792,12 @@ static void drive_backup_prepare(BlkActionState *common, Error **errp)
         goto out;
     }
 
-    /* Honor bdrv_try_set_aio_context() context acquisition requirements. */
+    /* Honor bdrv_try_change_aio_context() context acquisition requirements. */
     old_context = bdrv_get_aio_context(target_bs);
     aio_context_release(aio_context);
     aio_context_acquire(old_context);
 
-    ret = bdrv_try_set_aio_context(target_bs, aio_context, errp);
+    ret = bdrv_try_change_aio_context(target_bs, aio_context, NULL, errp);
     if (ret < 0) {
         bdrv_unref(target_bs);
         aio_context_release(old_context);
@@ -1892,12 +1892,12 @@ static void blockdev_backup_prepare(BlkActionState *common, Error **errp)
         return;
     }
 
-    /* Honor bdrv_try_set_aio_context() context acquisition requirements. */
+    /* Honor bdrv_try_change_aio_context() context acquisition requirements. */
     aio_context = bdrv_get_aio_context(bs);
     old_context = bdrv_get_aio_context(target_bs);
     aio_context_acquire(old_context);
 
-    ret = bdrv_try_set_aio_context(target_bs, aio_context, errp);
+    ret = bdrv_try_change_aio_context(target_bs, aio_context, NULL, errp);
     if (ret < 0) {
         aio_context_release(old_context);
         return;
@@ -3194,12 +3194,12 @@ void qmp_drive_mirror(DriveMirror *arg, Error **errp)
                     !bdrv_has_zero_init(target_bs)));
 
 
-    /* Honor bdrv_try_set_aio_context() context acquisition requirements. */
+    /* Honor bdrv_try_change_aio_context() context acquisition requirements. */
     old_context = bdrv_get_aio_context(target_bs);
     aio_context_release(aio_context);
     aio_context_acquire(old_context);
 
-    ret = bdrv_try_set_aio_context(target_bs, aio_context, errp);
+    ret = bdrv_try_change_aio_context(target_bs, aio_context, NULL, errp);
     if (ret < 0) {
         bdrv_unref(target_bs);
         aio_context_release(old_context);
@@ -3266,12 +3266,12 @@ void qmp_blockdev_mirror(bool has_job_id, const char *job_id,
 
     zero_target = (sync == MIRROR_SYNC_MODE_FULL);
 
-    /* Honor bdrv_try_set_aio_context() context acquisition requirements. */
+    /* Honor bdrv_try_change_aio_context() context acquisition requirements. */
     old_context = bdrv_get_aio_context(target_bs);
     aio_context = bdrv_get_aio_context(bs);
     aio_context_acquire(old_context);
 
-    ret = bdrv_try_set_aio_context(target_bs, aio_context, errp);
+    ret = bdrv_try_change_aio_context(target_bs, aio_context, NULL, errp);
 
     aio_context_release(old_context);
     aio_context_acquire(aio_context);
@@ -3767,7 +3767,7 @@ void qmp_x_blockdev_set_iothread(const char *node_name, StrOrNull *iothread,
     old_context = bdrv_get_aio_context(bs);
     aio_context_acquire(old_context);
 
-    bdrv_try_set_aio_context(bs, new_context, errp);
+    bdrv_try_change_aio_context(bs, new_context, NULL, errp);
 
     aio_context_release(old_context);
 }

docs/devel/multiple-iothreads.txt

@@ -109,7 +109,7 @@ The AioContext originates from the QEMU block layer, even though nowadays
 AioContext is a generic event loop that can be used by any QEMU subsystem.
 
 The block layer has support for AioContext integrated.  Each BlockDriverState
-is associated with an AioContext using bdrv_try_set_aio_context() and
+is associated with an AioContext using bdrv_try_change_aio_context() and
 bdrv_get_aio_context().  This allows block layer code to process I/O inside the
 right AioContext.  Other subsystems may wish to follow a similar approach.
 
@@ -134,5 +134,5 @@ Long-running jobs (usually in the form of coroutines) are best scheduled in
 the BlockDriverState's AioContext to avoid the need to acquire/release around
 each bdrv_*() call.  The functions bdrv_add/remove_aio_context_notifier,
 or alternatively blk_add/remove_aio_context_notifier if you use BlockBackends,
-can be used to get a notification whenever bdrv_try_set_aio_context() moves a
+can be used to get a notification whenever bdrv_try_change_aio_context() moves a
 BlockDriverState to a different AioContext.

include/block/block-global-state.h

@@ -220,8 +220,6 @@ void coroutine_fn bdrv_co_lock(BlockDriverState *bs);
  */
 void coroutine_fn bdrv_co_unlock(BlockDriverState *bs);
 
-int bdrv_try_set_aio_context(BlockDriverState *bs, AioContext *ctx,
-                             Error **errp);
 AioContext *bdrv_child_get_parent_aio_context(BdrvChild *c);
 bool bdrv_child_change_aio_context(BdrvChild *c, AioContext *ctx,
                                    GHashTable *visited, Transaction *tran,

job.c

@@ -588,7 +588,7 @@ static void coroutine_fn job_do_yield_locked(Job *job, uint64_t ns)
     next_aio_context = job->aio_context;
     /*
      * Coroutine has resumed, but in the meanwhile the job AioContext
-     * might have changed via bdrv_try_set_aio_context(), so we need to move
+     * might have changed via bdrv_try_change_aio_context(), so we need to move
      * the coroutine too in the new aiocontext.
      */
     while (qemu_get_current_aio_context() != next_aio_context) {

tests/unit/test-bdrv-drain.c

@@ -1538,16 +1538,16 @@ static void test_set_aio_context(void)
                               &error_abort);
 
     bdrv_drained_begin(bs);
-    bdrv_try_set_aio_context(bs, ctx_a, &error_abort);
+    bdrv_try_change_aio_context(bs, ctx_a, NULL, &error_abort);
 
     aio_context_acquire(ctx_a);
     bdrv_drained_end(bs);
 
     bdrv_drained_begin(bs);
-    bdrv_try_set_aio_context(bs, ctx_b, &error_abort);
+    bdrv_try_change_aio_context(bs, ctx_b, NULL, &error_abort);
     aio_context_release(ctx_a);
     aio_context_acquire(ctx_b);
-    bdrv_try_set_aio_context(bs, qemu_get_aio_context(), &error_abort);
+    bdrv_try_change_aio_context(bs, qemu_get_aio_context(), NULL, &error_abort);
     aio_context_release(ctx_b);
     bdrv_drained_end(bs);
 

tests/unit/test-block-iothread.c

@@ -765,7 +765,7 @@ static void test_propagate_mirror(void)
     filter = bdrv_find_node("filter_node");
 
     /* Change the AioContext of src */
-    bdrv_try_set_aio_context(src, ctx, &error_abort);
+    bdrv_try_change_aio_context(src, ctx, NULL, &error_abort);
     g_assert(bdrv_get_aio_context(src) == ctx);
     g_assert(bdrv_get_aio_context(target) == ctx);
     g_assert(bdrv_get_aio_context(filter) == ctx);
@@ -773,7 +773,7 @@ static void test_propagate_mirror(void)
 
     /* Change the AioContext of target */
     aio_context_acquire(ctx);
-    bdrv_try_set_aio_context(target, main_ctx, &error_abort);
+    bdrv_try_change_aio_context(target, main_ctx, NULL, &error_abort);
     aio_context_release(ctx);
     g_assert(bdrv_get_aio_context(src) == main_ctx);
     g_assert(bdrv_get_aio_context(target) == main_ctx);
@@ -783,7 +783,7 @@ static void test_propagate_mirror(void)
     blk = blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL);
     blk_insert_bs(blk, src, &error_abort);
 
-    bdrv_try_set_aio_context(target, ctx, &local_err);
+    bdrv_try_change_aio_context(target, ctx, NULL, &local_err);
     error_free_or_abort(&local_err);
 
     g_assert(blk_get_aio_context(blk) == main_ctx);
@@ -794,7 +794,7 @@ static void test_propagate_mirror(void)
     /* ...unless we explicitly allow it */
     aio_context_acquire(ctx);
     blk_set_allow_aio_context_change(blk, true);
-    bdrv_try_set_aio_context(target, ctx, &error_abort);
+    bdrv_try_change_aio_context(target, ctx, NULL, &error_abort);
     aio_context_release(ctx);
 
     g_assert(blk_get_aio_context(blk) == ctx);
@@ -806,7 +806,7 @@ static void test_propagate_mirror(void)
 
     aio_context_acquire(ctx);
     blk_set_aio_context(blk, main_ctx, &error_abort);
-    bdrv_try_set_aio_context(target, main_ctx, &error_abort);
+    bdrv_try_change_aio_context(target, main_ctx, NULL, &error_abort);
     aio_context_release(ctx);
 
     blk_unref(blk);