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block: Consistently call bdrv_activate() outside coroutine 

Migration code can call bdrv_activate() in coroutine context, whereas
other callers call it outside of coroutines. As it calls other code that
is not supposed to run in coroutines, standardise on running outside of
coroutines.

This adds a no_co_wrapper to switch to the main loop before calling
bdrv_activate().

Cc: qemu-stable@nongnu.org
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20230504115750.54437-3-kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
master
Kevin Wolf 2023-05-04 13:57:32 +02:00
parent 0050c163ff
commit da4afaff07
2 changed files with 14 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
block/block-backend.c
View File

@ -2024,7 +2024,15 @@ void blk_activate(BlockBackend *blk, Error **errp)
return;
}
bdrv_activate(bs, errp);
/*
* Migration code can call this function in coroutine context, so leave
* coroutine context if necessary.
*/
if (qemu_in_coroutine()) {
bdrv_co_activate(bs, errp);
} else {
bdrv_activate(bs, errp);
}
}
bool coroutine_fn blk_co_is_inserted(BlockBackend *blk)

6
include/block/block-global-state.h
View File

@ -166,7 +166,11 @@ int bdrv_amend_options(BlockDriverState *bs_new, QemuOpts *opts,
BlockDriverState *check_to_replace_node(BlockDriverState *parent_bs,
const char *node_name, Error **errp);
int bdrv_activate(BlockDriverState *bs, Error **errp);
int no_coroutine_fn bdrv_activate(BlockDriverState *bs, Error **errp);
int coroutine_fn no_co_wrapper
bdrv_co_activate(BlockDriverState *bs, Error **errp);
void bdrv_activate_all(Error **errp);
int bdrv_inactivate_all(void);