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bh=bdZQvoU71BxqN/jXUFvJWcOtH/L3ZpOToPERbcZ/qbQ=; b=U4qrotXkfIsb18PALuvzNSAXx8knmnwvXOi3SydwjXFEmxE2mHgKdJGv1Sp5Q4mNjxhUkn uSmynjvFfcijTNg5fMC6V205vOOvhNg6weuXAU+NFVH1SsWtZmiNrBjuNy5T9vfcVBQ0Ia 7HjSSTrOSpegAIjM2muB1Z4PymkqPPM= X-MC-Unique: rfgsyL6GM8W5rXBLnTNTpA-1 From: Kevin Wolf To: qemu-block@nongnu.org Cc: kwolf@redhat.com, qemu-devel@nongnu.org Subject: [PULL 06/26] block-coroutine-wrapper: Add no_co_wrapper_bdrv_rdlock functions Date: Thu, 12 Oct 2023 18:22:04 +0200 Message-ID: <20231012162224.240535-7-kwolf@redhat.com> In-Reply-To: <20231012162224.240535-1-kwolf@redhat.com> References: <20231012162224.240535-1-kwolf@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.4 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1697128290553100007 Content-Type: text/plain; charset="utf-8" Add a new wrapper type for GRAPH_RDLOCK functions that should be called from coroutine context. Signed-off-by: Kevin Wolf Message-ID: <20230929145157.45443-3-kwolf@redhat.com> Reviewed-by: Stefan Hajnoczi Signed-off-by: Kevin Wolf --- include/block/block-common.h | 7 +++++-- scripts/block-coroutine-wrapper.py | 10 +++++++--- 2 files changed, 12 insertions(+), 5 deletions(-) diff --git a/include/block/block-common.h b/include/block/block-common.h index 2d2af7230d..d7599564db 100644 --- a/include/block/block-common.h +++ b/include/block/block-common.h @@ -66,13 +66,16 @@ * function. The coroutine yields after scheduling the BH and is reentered= when * the wrapped function returns. * - * A no_co_wrapper_bdrv_wrlock function is a no_co_wrapper function that - * automatically takes the graph wrlock when calling the wrapped function. + * A no_co_wrapper_bdrv_rdlock function is a no_co_wrapper function that + * automatically takes the graph rdlock when calling the wrapped function.= In + * the same way, no_co_wrapper_bdrv_wrlock functions automatically take the + * graph wrlock. * * If the first parameter of the function is a BlockDriverState, BdrvChild= or * BlockBackend pointer, the AioContext lock for it is taken in the wrappe= r. */ #define no_co_wrapper +#define no_co_wrapper_bdrv_rdlock #define no_co_wrapper_bdrv_wrlock =20 #include "block/blockjob.h" diff --git a/scripts/block-coroutine-wrapper.py b/scripts/block-coroutine-w= rapper.py index 685d0b4ed4..a601c3c672 100644 --- a/scripts/block-coroutine-wrapper.py +++ b/scripts/block-coroutine-wrapper.py @@ -87,8 +87,9 @@ def __init__(self, wrapper_type: str, return_type: str, n= ame: str, raise ValueError(f"Invalid no_co function name: {self.name= }") if not self.create_only_co: raise ValueError(f"no_co function can't be mixed: {self.na= me}") - if self.graph_rdlock: - raise ValueError(f"no_co function can't be rdlock: {self.n= ame}") + if self.graph_rdlock and self.graph_wrlock: + raise ValueError("function can't be both rdlock and wrlock= : " + f"{self.name}") self.target_name =3D f'{subsystem}_{subname}' =20 self.ctx =3D self.gen_ctx() @@ -256,7 +257,10 @@ def gen_no_co_wrapper(func: FuncDecl) -> str: =20 graph_lock=3D'' graph_unlock=3D'' - if func.graph_wrlock: + if func.graph_rdlock: + graph_lock=3D' bdrv_graph_rdlock_main_loop();' + graph_unlock=3D' bdrv_graph_rdunlock_main_loop();' + elif func.graph_wrlock: graph_lock=3D' bdrv_graph_wrlock(NULL);' graph_unlock=3D' bdrv_graph_wrunlock();' =20 --=20 2.41.0