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nbd: change error checking order for bitmaps 

Check that the bitmap is not in use prior to it checking if it is
not enabled/recording guest writes. The bitmap being busy was likely
at the behest of the user, so this error has a greater chance of being
understood by the user.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-id: 20190223000614.13894-6-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
master
John Snow 2019-03-12 12:05:48 -04:00
parent 8b2e20f64f
commit 3b78a92776
1 changed files with 5 additions and 5 deletions
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10
nbd/server.c
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@ -1510,6 +1510,11 @@ NBDExport *nbd_export_new(BlockDriverState *bs, uint64_t dev_offset,
goto fail;
}
if (bdrv_dirty_bitmap_user_locked(bm)) {
error_setg(errp, "Bitmap '%s' is in use", bitmap);
goto fail;
}
if ((nbdflags & NBD_FLAG_READ_ONLY) && bdrv_is_writable(bs) &&
bdrv_dirty_bitmap_enabled(bm)) {
error_setg(errp,
@ -1518,11 +1523,6 @@ NBDExport *nbd_export_new(BlockDriverState *bs, uint64_t dev_offset,
goto fail;
}
if (bdrv_dirty_bitmap_user_locked(bm)) {
error_setg(errp, "Bitmap '%s' is in use", bitmap);
goto fail;
}
bdrv_dirty_bitmap_set_qmp_locked(bm, true);
exp->export_bitmap = bm;
exp->export_bitmap_context = g_strdup_printf("qemu:dirty-bitmap:%s",