Re: [PATCH v4 14/25] include/systemu/blockdev.h: global state API

[Hanna Reitz <hreitz@redhat.com>]

Subject: s/systemu/sysemu/

On 25.10.21 12:17, Emanuele Giuseppe Esposito wrote:
> blockdev functions run always under the BQL lock.
>
> Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
> ---
>   include/sysemu/blockdev.h | 18 ++++++++++++++----
>   1 file changed, 14 insertions(+), 4 deletions(-)
>
> diff --git a/include/sysemu/blockdev.h b/include/sysemu/blockdev.h
> index 960b54d320..b07f15df09 100644
> --- a/include/sysemu/blockdev.h
> +++ b/include/sysemu/blockdev.h
> @@ -13,9 +13,6 @@
>   #include "block/block.h"
>   #include "qemu/queue.h"
>   
> -void blockdev_mark_auto_del(BlockBackend *blk);
> -void blockdev_auto_del(BlockBackend *blk);
> -
>   typedef enum {
>       IF_DEFAULT = -1,            /* for use with drive_add() only */
>       /*
> @@ -40,6 +37,16 @@ struct DriveInfo {
>       QTAILQ_ENTRY(DriveInfo) next;
>   };
>   
> +/*
> + * Global state (GS) API. These functions run under the BQL lock.
> + *
> + * See include/block/block-global-state.h for more information about
> + * the GS API.
> + */
> +
> +void blockdev_mark_auto_del(BlockBackend *blk);
> +void blockdev_auto_del(BlockBackend *blk);
> +
>   DriveInfo *blk_legacy_dinfo(BlockBackend *blk);
>   DriveInfo *blk_set_legacy_dinfo(BlockBackend *blk, DriveInfo *dinfo);
>   BlockBackend *blk_by_legacy_dinfo(DriveInfo *dinfo);
> @@ -50,10 +57,13 @@ DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit);
>   void drive_check_orphaned(void);
>   DriveInfo *drive_get_by_index(BlockInterfaceType type, int index);
>   int drive_get_max_bus(BlockInterfaceType type);
> -int drive_get_max_devs(BlockInterfaceType type);
>   DriveInfo *drive_get_next(BlockInterfaceType type);
>   
>   DriveInfo *drive_new(QemuOpts *arg, BlockInterfaceType block_default_type,
>                        Error **errp);
>   
> +/* Common functions that are neither I/O nor Global State */
> +
> +int drive_get_max_devs(BlockInterfaceType type);
> +

It seems to me like this function is never used and could just be 
dropped.  In any case, if it were used, it looks to me like it’d be used 
in a GS context.  (Not that I know anything about it, but I don’t see 
what makes it different from the other functions here.)

Hanna