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| author | Kevin Wolf <kwolf@redhat.com> | 2016-03-21 11:30:57 +0100 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2016-05-19 16:45:29 +0200 |
| commit | 31dce3ccca98bc9f9eb57f8b08b008edd07661ba (patch) | |
| tree | dc0e381967d0135f1bc11beae16efc6b1391c31c /include/sysemu/block-backend.h | |
| parent | f2cd875d54e95f87a4c994cfef082f09b4953aa9 (diff) | |
| download | qemu-31dce3ccca98bc9f9eb57f8b08b008edd07661ba.tar.gz | |
block: throttle-groups: Use BlockBackend pointers internally
As a first step towards moving I/O throttling to the BlockBackend level,
this patch changes all pointers in struct ThrottleGroup from referencing
a BlockDriverState to referencing a BlockBackend.
This change is valid because we made sure that throttling can only be
enabled on BDSes which have a BB attached.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'include/sysemu/block-backend.h')
| -rw-r--r-- | include/sysemu/block-backend.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h index a771603bd0..1dcd70e2ca 100644 --- a/include/sysemu/block-backend.h +++ b/include/sysemu/block-backend.h @@ -63,7 +63,10 @@ typedef struct BlockDevOps { * fields that must be public. This is in particular for QLIST_ENTRY() and * friends so that BlockBackends can be kept in lists outside block-backend.c */ typedef struct BlockBackendPublic { - int dummy; /* empty structs are illegal */ + /* I/O throttling */ + /* The following fields are protected by the ThrottleGroup lock. + * See the ThrottleGroup documentation for details. */ + QLIST_ENTRY(BlockBackendPublic) round_robin; } BlockBackendPublic; BlockBackend *blk_new(Error **errp); |