block.c (0f0b1e29d35e0a7da6271b3fa0fefa63380204e7) block.c (a2c37a30422328fe2391bd1ff342f8941c7681bc)
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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5050/*
5051 * A function to remove backing or file child of @bs.
5052 * Function doesn't update permissions, caller is responsible for this.
5053 */
5054static void bdrv_remove_file_or_backing_child(BlockDriverState *bs,
5055 BdrvChild *child,
5056 Transaction *tran)
5057{
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

--- 5041 unchanged lines hidden (view full) ---

5050/*
5051 * A function to remove backing or file child of @bs.
5052 * Function doesn't update permissions, caller is responsible for this.
5053 */
5054static void bdrv_remove_file_or_backing_child(BlockDriverState *bs,
5055 BdrvChild *child,
5056 Transaction *tran)
5057{
5058 BdrvChild **childp;
5059 BdrvRemoveFilterOrCowChild *s;
5060
5058 BdrvRemoveFilterOrCowChild *s;
5059
5060 assert(child == bs->backing || child == bs->file);
5061
5061 if (!child) {
5062 return;
5063 }
5064
5062 if (!child) {
5063 return;
5064 }
5065
5065 if (child == bs->backing) {
5066 childp = &bs->backing;
5067 } else if (child == bs->file) {
5068 childp = &bs->file;
5069 } else {
5070 g_assert_not_reached();
5071 }
5072
5073 if (child->bs) {
5066 if (child->bs) {
5074 bdrv_replace_child_tran(*childp, NULL, tran);
5067 bdrv_replace_child_tran(child, NULL, tran);
5075 }
5076
5077 s = g_new(BdrvRemoveFilterOrCowChild, 1);
5078 *s = (BdrvRemoveFilterOrCowChild) {
5079 .child = child,
5068 }
5069
5070 s = g_new(BdrvRemoveFilterOrCowChild, 1);
5071 *s = (BdrvRemoveFilterOrCowChild) {
5072 .child = child,
5080 .is_backing = (childp == &bs->backing),
5073 .is_backing = (child == bs->backing),
5081 };
5082 tran_add(tran, &bdrv_remove_filter_or_cow_child_drv, s);
5083
5074 };
5075 tran_add(tran, &bdrv_remove_filter_or_cow_child_drv, s);
5076
5084 *childp = NULL;
5077 if (s->is_backing) {
5078 bs->backing = NULL;
5079 } else {
5080 bs->file = NULL;
5081 }
5085}
5086
5087/*
5088 * A function to remove backing-chain child of @bs if exists: cow child for
5089 * format nodes (always .backing) and filter child for filters (may be .file or
5090 * .backing)
5091 */
5092static void bdrv_remove_filter_or_cow_child(BlockDriverState *bs,

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5083
5084/*
5085 * A function to remove backing-chain child of @bs if exists: cow child for
5086 * format nodes (always .backing) and filter child for filters (may be .file or
5087 * .backing)
5088 */
5089static void bdrv_remove_filter_or_cow_child(BlockDriverState *bs,

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