block.c (aa269ff888d70158fe0c26ed17814046bdc19bd5) block.c (8dc8a60c9e52fa446a5135180592c0cd4213acfb)
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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1608 * The caller must always hold @bs AioContext lock, because this function calls
1609 * bdrv_refresh_total_sectors() which polls when called from non-coroutine
1610 * context.
1611 */
1612static int no_coroutine_fn GRAPH_UNLOCKED
1613bdrv_open_driver(BlockDriverState *bs, BlockDriver *drv, const char *node_name,
1614 QDict *options, int open_flags, Error **errp)
1615{
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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1608 * The caller must always hold @bs AioContext lock, because this function calls
1609 * bdrv_refresh_total_sectors() which polls when called from non-coroutine
1610 * context.
1611 */
1612static int no_coroutine_fn GRAPH_UNLOCKED
1613bdrv_open_driver(BlockDriverState *bs, BlockDriver *drv, const char *node_name,
1614 QDict *options, int open_flags, Error **errp)
1615{
1616 AioContext *ctx;
1616 Error *local_err = NULL;
1617 int i, ret;
1618 GLOBAL_STATE_CODE();
1619
1620 bdrv_assign_node_name(bs, node_name, &local_err);
1621 if (local_err) {
1622 error_propagate(errp, local_err);
1623 return -EINVAL;

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1655 * declaring support explicitly.
1656 *
1657 * Drivers must not propagate this flag accidentally when they initiate I/O
1658 * to a bounce buffer. That case should be rare though.
1659 */
1660 bs->supported_read_flags |= BDRV_REQ_REGISTERED_BUF;
1661 bs->supported_write_flags |= BDRV_REQ_REGISTERED_BUF;
1662
1617 Error *local_err = NULL;
1618 int i, ret;
1619 GLOBAL_STATE_CODE();
1620
1621 bdrv_assign_node_name(bs, node_name, &local_err);
1622 if (local_err) {
1623 error_propagate(errp, local_err);
1624 return -EINVAL;

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1656 * declaring support explicitly.
1657 *
1658 * Drivers must not propagate this flag accidentally when they initiate I/O
1659 * to a bounce buffer. That case should be rare though.
1660 */
1661 bs->supported_read_flags |= BDRV_REQ_REGISTERED_BUF;
1662 bs->supported_write_flags |= BDRV_REQ_REGISTERED_BUF;
1663
1664 /* Get the context after .bdrv_open, it can change the context */
1665 ctx = bdrv_get_aio_context(bs);
1666 aio_context_acquire(ctx);
1667
1663 ret = bdrv_refresh_total_sectors(bs, bs->total_sectors);
1664 if (ret < 0) {
1665 error_setg_errno(errp, -ret, "Could not refresh total sector count");
1668 ret = bdrv_refresh_total_sectors(bs, bs->total_sectors);
1669 if (ret < 0) {
1670 error_setg_errno(errp, -ret, "Could not refresh total sector count");
1671 aio_context_release(ctx);
1666 return ret;
1667 }
1668
1669 bdrv_graph_rdlock_main_loop();
1670 bdrv_refresh_limits(bs, NULL, &local_err);
1671 bdrv_graph_rdunlock_main_loop();
1672 return ret;
1673 }
1674
1675 bdrv_graph_rdlock_main_loop();
1676 bdrv_refresh_limits(bs, NULL, &local_err);
1677 bdrv_graph_rdunlock_main_loop();
1678 aio_context_release(ctx);
1672
1673 if (local_err) {
1674 error_propagate(errp, local_err);
1675 return -EINVAL;
1676 }
1677
1678 assert(bdrv_opt_mem_align(bs) != 0);
1679 assert(bdrv_min_mem_align(bs) != 0);

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1680 if (local_err) {
1681 error_propagate(errp, local_err);
1682 return -EINVAL;
1683 }
1684
1685 assert(bdrv_opt_mem_align(bs) != 0);
1686 assert(bdrv_min_mem_align(bs) != 0);

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