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bh=T/My3AtkkpcT9ANcA2UNoa81j7RQLAySsD3JTR+u7XY=; b=A/yq6aqVh4XIb+7tvuVDzZwtp4GKvSy+yET0J6gA+5Y7PcX879g1KZqxNPJXrQp7D95bq3 8WCBYexs5ezFq2QUzfen8DMat/mexarCLtByNW718MU3bfKTEx1MuTXlx1MfB3Ap50J+RT QS3wpIYnRim2bBZKvqooQU+X4fdhuFk= X-MC-Unique: _EYQY6B9PHSoSKiDocGoGw-1 From: Emanuele Giuseppe Esposito To: qemu-block@nongnu.org Subject: [RFC PATCH 1/3] block-copy: improve documentation for BlockCopyTask type and functions Date: Tue, 20 Apr 2021 12:04:14 +0200 Message-Id: <20210420100416.30713-2-eesposit@redhat.com> In-Reply-To: <20210420100416.30713-1-eesposit@redhat.com> References: <20210420100416.30713-1-eesposit@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=eesposit@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable 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=eesposit@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 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, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Emanuele Giuseppe Esposito , Vladimir Sementsov-Ogievskiy , qemu-devel@nongnu.org, Max Reitz , Paolo Bonzini , John Snow Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" As done in BlockCopyCallState, categorize BlockCopyTask in IN, State and OUT fields. This is just to understand which field has to be protected with a lock. Also add coroutine_fn attribute to block_copy_task_create, because it is only usedn block_copy_dirty_clusters, a coroutine function itself. Signed-off-by: Emanuele Giuseppe Esposito --- block/block-copy.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/block/block-copy.c b/block/block-copy.c index 39ae481c8b..03df50a354 100644 --- a/block/block-copy.c +++ b/block/block-copy.c @@ -48,25 +48,32 @@ typedef struct BlockCopyCallState { QLIST_ENTRY(BlockCopyCallState) list; =20 /* State */ - int ret; bool finished; QemuCoSleepState *sleep_state; bool cancelled; =20 /* OUT parameters */ + int ret; bool error_is_read; } BlockCopyCallState; =20 typedef struct BlockCopyTask { + /* IN parameters. Initialized in block_copy_task_create() + * and never changed. + */ AioTask task; - BlockCopyState *s; BlockCopyCallState *call_state; + + /* State */ int64_t offset; int64_t bytes; bool zeroes; - QLIST_ENTRY(BlockCopyTask) list; CoQueue wait_queue; /* coroutines blocked on this task */ + + /* To reference all call states from BlockCopyTask */ + QLIST_ENTRY(BlockCopyTask) list; + } BlockCopyTask; =20 static int64_t task_end(BlockCopyTask *task) @@ -153,7 +160,7 @@ static bool coroutine_fn block_copy_wait_one(BlockCopyS= tate *s, int64_t offset, * Search for the first dirty area in offset/bytes range and create task at * the beginning of it. */ -static BlockCopyTask *block_copy_task_create(BlockCopyState *s, +static BlockCopyTask *coroutine_fn block_copy_task_create(BlockCopyState *= s, BlockCopyCallState *call_stat= e, int64_t offset, int64_t bytes) { --=20 2.30.2