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bh=phCrbGuwXMiTVkL+w3AnM6RYndZqedcNqgxPPLwg4QQ=; b=d0A6p7SeMuR9kzXpkmeWHHP675LErkFEEZSzr+XXz4DwleSi1WIMLebM1UUleIjFhSZljT MTySgBBYvliQcF+rX4+N/e3OLcH3YtmaGC25BCEIq1LTeWFCcE2jFpieaWQouWDdtO5lOv RpGKwow5G01IkA2z/ISVF9OkqjdXeqI= X-MC-Unique: ezWXMOOLPgSQX7nAwbLhTQ-1 From: Eric Blake To: qemu-devel@nongnu.org Subject: [PULL 15/15] block-backend: update blk_co_pwrite() and blk_co_pread() wrappers Date: Fri, 15 Oct 2021 16:10:10 -0500 Message-Id: <20211015211011.1272011-16-eblake@redhat.com> In-Reply-To: <20211015211011.1272011-1-eblake@redhat.com> References: <20211015211011.1272011-1-eblake@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=eblake@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=eblake@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.049, 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_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham 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: Vladimir Sementsov-Ogievskiy Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1634333214807100001 Content-Type: text/plain; charset="utf-8" From: Vladimir Sementsov-Ogievskiy Make bytes argument int64_t to be consistent with modern block-layer. Callers should be OK with it as type becomes wider. What is inside functions? - Conversion from int64_t to size_t. Still, we can't have a buffer larger than SIZE_MAX, therefore bytes should not be larger than SIZE_MAX as well. Add an assertion. - Passing to blk_co_pwritev() / blk_co_preadv() which already has int64_t bytes argument. Signed-off-by: Vladimir Sementsov-Ogievskiy Message-Id: <20211007175243.642516-2-vsementsov@virtuozzo.com> Reviewed-by: Eric Blake [eblake: spelling fix] Signed-off-by: Eric Blake --- include/sysemu/block-backend.h | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h index 3fbc74e17cb4..e5e1524f065b 100644 --- a/include/sysemu/block-backend.h +++ b/include/sysemu/block-backend.h @@ -137,20 +137,24 @@ int coroutine_fn blk_co_pwritev(BlockBackend *blk, in= t64_t offset, BdrvRequestFlags flags); static inline int coroutine_fn blk_co_pread(BlockBackend *blk, int64_t off= set, - unsigned int bytes, void *buf, + int64_t bytes, void *buf, BdrvRequestFlags flags) { QEMUIOVector qiov =3D QEMU_IOVEC_INIT_BUF(qiov, buf, bytes); + assert(bytes <=3D SIZE_MAX); + return blk_co_preadv(blk, offset, bytes, &qiov, flags); } static inline int coroutine_fn blk_co_pwrite(BlockBackend *blk, int64_t of= fset, - unsigned int bytes, void *buf, + int64_t bytes, void *buf, BdrvRequestFlags flags) { QEMUIOVector qiov =3D QEMU_IOVEC_INIT_BUF(qiov, buf, bytes); + assert(bytes <=3D SIZE_MAX); + return blk_co_pwritev(blk, offset, bytes, &qiov, flags); } --=20 2.31.1