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Emulated devices and other BlockBackend users wishing to take advantage of blk_register_buf() all have the same repetitive job: register RAMBlocks with the BlockBackend using RAMBlockNotifier. Add a BlockRAMRegistrar API to do this. A later commit will use this from hw/block/virtio-blk.c. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com> Message-id: 20221013185908.1297568-10-stefanha@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
38 lines
925 B
C
38 lines
925 B
C
/*
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* BlockBackend RAM Registrar
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#ifndef BLOCK_RAM_REGISTRAR_H
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#define BLOCK_RAM_REGISTRAR_H
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#include "exec/ramlist.h"
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/**
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* struct BlockRAMRegistrar:
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*
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* Keeps RAMBlock memory registered with a BlockBackend using
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* blk_register_buf() including hotplugged memory.
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*
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* Emulated devices or other BlockBackend users initialize a BlockRAMRegistrar
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* with blk_ram_registrar_init() before submitting I/O requests with the
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* BDRV_REQ_REGISTERED_BUF flag set.
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*/
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typedef struct {
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BlockBackend *blk;
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RAMBlockNotifier notifier;
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bool ok;
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} BlockRAMRegistrar;
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void blk_ram_registrar_init(BlockRAMRegistrar *r, BlockBackend *blk);
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void blk_ram_registrar_destroy(BlockRAMRegistrar *r);
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/* Have all RAMBlocks been registered successfully? */
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static inline bool blk_ram_registrar_ok(BlockRAMRegistrar *r)
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{
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return r->ok;
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}
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#endif /* BLOCK_RAM_REGISTRAR_H */
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