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block: Factor out bdrv_drain_all_begin_nopoll()

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Provide a separate function that just quiesces the users of a node to
prevent new requests from coming in, but without waiting for the already
in-flight I/O to complete.

This function can be used in contexts where polling is not allowed.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20221207131838.239125-2-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2022-12-07 14:18:21 +01:00
parent 0508d0be4b
commit da0bd74434
2 changed files with 14 additions and 6 deletions
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1
include/block/block-global-state.h
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@ -152,6 +152,7 @@ int bdrv_inactivate_all(void);
int bdrv_flush_all(void);
void bdrv_close_all(void);
void bdrv_drain_all_begin(void);
void bdrv_drain_all_begin_nopoll(void);
void bdrv_drain_all_end(void);
void bdrv_drain_all(void);