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block/export: call blk_set_dev_ops(blk, NULL, NULL) 

Most export types install BlockDeviceOps pointers. It is easy to forget
to remove them because that happens automatically via the "drive" qdev
property in hw/ but not block/export/.

Put blk_set_dev_ops(blk, NULL, NULL) calls in the core export.c code so
the export types don't need to remember.

This fixes the nbd and vhost-user-blk export types.

Fixes: fd6afc501a ("nbd/server: Use drained block ops to quiesce the server")
Fixes: ca858a5fe9 ("vhost-user-blk-server: notify client about disk resize")
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20230502211119.720647-1-stefanha@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2023-05-02 17:11:19 -04:00 committed by Eric Blake
parent 7ade2b186d
commit de79b52604
2 changed files with 2 additions and 1 deletions
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2
block/export/export.c
View File

@ -192,6 +192,7 @@ BlockExport *blk_exp_add(BlockExportOptions *export, Error **errp)
return exp;
fail:
blk_set_dev_ops(exp->blk, NULL, NULL);
blk_unref(blk);
aio_context_release(ctx);
if (exp) {
@ -219,6 +220,7 @@ static void blk_exp_delete_bh(void *opaque)
assert(exp->refcount == 0);
QLIST_REMOVE(exp, next);
exp->drv->delete(exp);
blk_set_dev_ops(exp->blk, NULL, NULL);
blk_unref(exp->blk);
qapi_event_send_block_export_deleted(exp->id);
g_free(exp->id);

1
block/export/vduse-blk.c
View File

@ -346,7 +346,6 @@ static void vduse_blk_exp_delete(BlockExport *exp)
blk_remove_aio_context_notifier(exp->blk, blk_aio_attached, blk_aio_detach,
vblk_exp);
blk_set_dev_ops(exp->blk, NULL, NULL);
ret = vduse_dev_destroy(vblk_exp->dev);
if (ret != -EBUSY) {
unlink(vblk_exp->recon_file);