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bh=TBTjoxBNCRgAeE2hy5gXUSfqj/3+BAUspBw9XpugdDQ=; b=YiDzTSusT30YLfLVvEPfm5BZn1d72JJsA4x4Ihxv8WI5xVgOUsR/AJqEvvAGEFkiCzouzW wH0oR4qnxSEq/fceaEzm5DFTcouMnUClyg+Q2l+syqLo4HpmyTcLpb64uN2Wpry4zCvX0T uWztfGGDZ9ormFV9CRGJ9zbR0OevzoY= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-202-G2tmT7fpOy21yykYsi-q2w-1; Mon, 04 Jan 2021 10:02:24 -0500 X-MC-Unique: G2tmT7fpOy21yykYsi-q2w-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 942C559; Mon, 4 Jan 2021 15:02:22 +0000 (UTC) Received: from redhat.com (ovpn-114-43.ams2.redhat.com [10.36.114.43]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 803E35D768; Mon, 4 Jan 2021 15:02:07 +0000 (UTC) Date: Mon, 4 Jan 2021 15:02:04 +0000 From: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= To: elena.ufimtseva@oracle.com Subject: Re: [PATCH v15 07/20] multi-process: add qio channel write function Message-ID: <20210104150204.GL640208@redhat.com> References: <5326844a151bf409842c8df343a47d019ec9e633.1608702853.git.elena.ufimtseva@oracle.com> MIME-Version: 1.0 In-Reply-To: <5326844a151bf409842c8df343a47d019ec9e633.1608702853.git.elena.ufimtseva@oracle.com> User-Agent: Mutt/1.14.6 (2020-07-11) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=berrange@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=63.128.21.124; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -29 X-Spam_score: -3.0 X-Spam_bar: --- X-Spam_report: (-3.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.243, 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=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: , Reply-To: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= Cc: fam@euphon.net, john.g.johnson@oracle.com, swapnil.ingle@nutanix.com, mst@redhat.com, qemu-devel@nongnu.org, kraxel@redhat.com, jag.raman@oracle.com, quintela@redhat.com, armbru@redhat.com, kanth.ghatraju@oracle.com, felipe@nutanix.com, thuth@redhat.com, ehabkost@redhat.com, konrad.wilk@oracle.com, dgilbert@redhat.com, alex.williamson@redhat.com, stefanha@redhat.com, pbonzini@redhat.com, kwolf@redhat.com, mreitz@redhat.com, ross.lagerwall@citrix.com, marcandre.lureau@gmail.com, thanos.makatos@nutanix.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Since this is independent of the multi-process code, it should have a subject prefix of "io:". I'd suggest io: add qio_channel_writev_full_all helper On Tue, Dec 22, 2020 at 10:14:42PM -0800, elena.ufimtseva@oracle.com wrote: > From: Elena Ufimtseva > > Adds qio_channel_writev_full_all() to transmit both data and FDs. > Refactors existing code to use this function. > > Signed-off-by: Elena Ufimtseva > Signed-off-by: John G Johnson > Signed-off-by: Jagannathan Raman > Reviewed-by: Stefan Hajnoczi > --- > include/io/channel.h | 25 +++++++++++++++++++++++++ > io/channel.c | 17 ++++++++++++++++- > 2 files changed, 41 insertions(+), 1 deletion(-) > > diff --git a/include/io/channel.h b/include/io/channel.h > index 4d6fe45f63..2378567d4b 100644 > --- a/include/io/channel.h > +++ b/include/io/channel.h > @@ -774,4 +774,29 @@ void qio_channel_set_aio_fd_handler(QIOChannel *ioc, > IOHandler *io_write, > void *opaque); > > +/** > + * qio_channel_writev_full_all: > + * @ioc: the channel object > + * @iov: the array of memory regions to write data from > + * @niov: the length of the @iov array > + * @fds: an array of file handles to send > + * @nfds: number of file handles in @fds > + * @errp: pointer to a NULL-initialized error object > + * > + * > + * Behaves like qio_channel_writev_full but will attempt > + * to send all data passed (file handles and memory regions). > + * The function will wait for all requested data > + * to be written, yielding from the current coroutine > + * if required. > + * > + * Returns: 0 if all bytes were written, or -1 on error > + */ > + > +int qio_channel_writev_full_all(QIOChannel *ioc, > + const struct iovec *iov, > + size_t niov, > + int *fds, size_t nfds, > + Error **errp); Copy-paste mistake - alignment of parameters is incorrect now. > + > #endif /* QIO_CHANNEL_H */ > diff --git a/io/channel.c b/io/channel.c > index 93d449dee2..bde1f6d0f4 100644 > --- a/io/channel.c > +++ b/io/channel.c > @@ -156,11 +156,22 @@ int qio_channel_writev_all(QIOChannel *ioc, > const struct iovec *iov, > size_t niov, > Error **errp) > +{ > + return qio_channel_writev_full_all(ioc, iov, niov, NULL, 0, errp); > +} > + > +int qio_channel_writev_full_all(QIOChannel *ioc, > + const struct iovec *iov, > + size_t niov, > + int *fds, size_t nfds, > + Error **errp) > { > int ret = -1; > struct iovec *local_iov = g_new(struct iovec, niov); > struct iovec *local_iov_head = local_iov; > unsigned int nlocal_iov = niov; > + int *local_fds = fds; > + size_t local_nfds = nfds; I don't see any need for these extra variables - just use the parameters in place > > nlocal_iov = iov_copy(local_iov, nlocal_iov, > iov, niov, > @@ -168,7 +179,8 @@ int qio_channel_writev_all(QIOChannel *ioc, > > while (nlocal_iov > 0) { > ssize_t len; > - len = qio_channel_writev(ioc, local_iov, nlocal_iov, errp); > + len = qio_channel_writev_full(ioc, local_iov, nlocal_iov, local_fds, > + local_nfds, errp); > if (len == QIO_CHANNEL_ERR_BLOCK) { > if (qemu_in_coroutine()) { > qio_channel_yield(ioc, G_IO_OUT); > @@ -182,6 +194,9 @@ int qio_channel_writev_all(QIOChannel *ioc, > } > > iov_discard_front(&local_iov, &nlocal_iov, len); > + > + local_fds = NULL; > + local_nfds = 0; > } > > ret = 0; If the above tweaks are made then Acked-by: Daniel P. Berrangé Regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|