block.c (caa9cbd566877b34e9abcc04d936116fc5e0ab28) block.c (774c726ceb2a3aa039dc20f0b51c9d36a2c6760d)
1/*
2 * QEMU System Emulator block driver
3 *
4 * Copyright (c) 2003 Fabrice Bellard
5 * Copyright (c) 2020 Virtuozzo International GmbH.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal

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7977{
7978 GLOBAL_STATE_CODE();
7979 if (!parent_bs->drv || !parent_bs->drv->bdrv_add_child) {
7980 error_setg(errp, "The node %s does not support adding a child",
7981 bdrv_get_device_or_node_name(parent_bs));
7982 return;
7983 }
7984
1/*
2 * QEMU System Emulator block driver
3 *
4 * Copyright (c) 2003 Fabrice Bellard
5 * Copyright (c) 2020 Virtuozzo International GmbH.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal

--- 7968 unchanged lines hidden (view full) ---

7977{
7978 GLOBAL_STATE_CODE();
7979 if (!parent_bs->drv || !parent_bs->drv->bdrv_add_child) {
7980 error_setg(errp, "The node %s does not support adding a child",
7981 bdrv_get_device_or_node_name(parent_bs));
7982 return;
7983 }
7984
7985 /*
7986 * Non-zoned block drivers do not follow zoned storage constraints
7987 * (i.e. sequential writes to zones). Refuse mixing zoned and non-zoned
7988 * drivers in a graph.
7989 */
7990 if (!parent_bs->drv->supports_zoned_children &&
7991 child_bs->bl.zoned == BLK_Z_HM) {
7992 /*
7993 * The host-aware model allows zoned storage constraints and random
7994 * write. Allow mixing host-aware and non-zoned drivers. Using
7995 * host-aware device as a regular device.
7996 */
7997 error_setg(errp, "Cannot add a %s child to a %s parent",
7998 child_bs->bl.zoned == BLK_Z_HM ? "zoned" : "non-zoned",
7999 parent_bs->drv->supports_zoned_children ?
8000 "support zoned children" : "not support zoned children");
8001 return;
8002 }
8003
7985 if (!QLIST_EMPTY(&child_bs->parents)) {
7986 error_setg(errp, "The node %s already has a parent",
7987 child_bs->node_name);
7988 return;
7989 }
7990
7991 parent_bs->drv->bdrv_add_child(parent_bs, child_bs, errp);
7992}

--- 287 unchanged lines hidden --- 		8004 if (!QLIST_EMPTY(&child_bs->parents)) {
8005 error_setg(errp, "The node %s already has a parent",
8006 child_bs->node_name);
8007 return;
8008 }
8009
8010 parent_bs->drv->bdrv_add_child(parent_bs, child_bs, errp);
8011}

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