From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 88DB1C433FE for ; Thu, 13 Jan 2022 16:16:11 +0000 (UTC) Received: from localhost ([::1]:37916 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1n82lm-0007uT-BU for qemu-devel@archiver.kernel.org; Thu, 13 Jan 2022 11:16:10 -0500 Received: from eggs.gnu.org ([209.51.188.92]:37156) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1n82h5-0004ql-9Y; Thu, 13 Jan 2022 11:11:19 -0500 Received: from [2607:f8b0:4864:20::330] (port=34346 helo=mail-ot1-x330.google.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1n82h2-0006U6-Ri; Thu, 13 Jan 2022 11:11:18 -0500 Received: by mail-ot1-x330.google.com with SMTP id m8-20020a9d4c88000000b00592bae7944bso3612438otf.1; Thu, 13 Jan 2022 08:11:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=hRRZ862Wg5pnbZnXrKyZPkP//z4GKxeOWsAjXTt3Huw=; b=ZpCerM6PfWM4jsh8/m4v8oW+TPsrfxe4a3kqZxrtAtmCrHKIXpUy9r0I/IWuvwEs3d ISVwPxaTo5bPYvkQVTvwVRZW7cT4m3SkzDk9Y7egCNS6MupHoabr+q/03tOGQlDVgxnc vE6y+vMJt+K729s15g3VM8tAFkKvbUQBd+1QSv/I1g53oFPLRSSYtjALb3uiiP+UrI7c AZKTPHOqi/BT/4lGRiaXCG6v6hmjkWWTNKvzJWDtOoJJ48C349YMJIFypqp++F4+YGCO 1RPCp8tUqfl0SMwFkOTL2xZNH7mmek7LxhWl251QnWchxb12/0qA64JozjjwEGwa9D+n Pa9g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=hRRZ862Wg5pnbZnXrKyZPkP//z4GKxeOWsAjXTt3Huw=; b=3JIgV8wNVkh0MI0ruuxnTxa1qAm9k04jLIofFg5f28OBJkT0n4/2KwwwZ0HOg0801i mfZjGmRk2UGE171Eijrlw9H7G1o4HN+E1Zh7UdY+JRsgLFAxlOK4kv7+ffSj+Qp26HCg /56TeylghH5Pfy+SvvmXLG3mVisuO2+r5nKkIgj7joSUWCLXu0eg3fhgiPsyKqZ5TABt ODLTKviJ+MyKhvb3tfw1mcJz8V99d7pOx5ZpSDjgc0hz7jPlzdaCWAgP0pY6hxCvmuJm a2CtJIcbvrHQ6HHfzPNxwIi7jMa0S9Q8RLjWpP7qZdatzPIchGzVIgq4g5W9h6cm2YAh TN1A== X-Gm-Message-State: AOAM531NcmHPQkc2do9QWy+tdbcogfIRVdR0cRQOij3zM/yfWjAPP74N fW7AEfdeCEyASTUQX3nNwGWvEo7NkEFN4t3nu2w= X-Google-Smtp-Source: ABdhPJzlG48upTkTsr9AyJjS4C8HRG7fsBo2jQLnFaLKbChI/gPW3GegZdG36Fw7W7EUyCaRMX7uhUKMzatwQ58kEro= X-Received: by 2002:a05:6830:3:: with SMTP id c3mr3508416otp.235.1642090274629; Thu, 13 Jan 2022 08:11:14 -0800 (PST) MIME-Version: 1.0 References: <20220113150113.58437-1-yaroshchuk2000@gmail.com> <20220113150113.58437-4-yaroshchuk2000@gmail.com> In-Reply-To: <20220113150113.58437-4-yaroshchuk2000@gmail.com> From: Akihiko Odaki Date: Fri, 14 Jan 2022 01:11:03 +0900 Message-ID: Subject: Re: [PATCH v12 3/7] net/vmnet: implement shared mode (vmnet-shared) To: Vladislav Yaroshchuk Content-Type: text/plain; charset="UTF-8" X-Host-Lookup-Failed: Reverse DNS lookup failed for 2607:f8b0:4864:20::330 (failed) Received-SPF: pass client-ip=2607:f8b0:4864:20::330; envelope-from=akihiko.odaki@gmail.com; helo=mail-ot1-x330.google.com X-Spam_score_int: -12 X-Spam_score: -1.3 X-Spam_bar: - X-Spam_report: (-1.3 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no 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: , Cc: Peter Maydell , Gerd Hoffmann , qemu-block@nongnu.org, =?UTF-8?B?QWxleCBCZW5uw6ll?= , Jason Wang , phillip.ennen@gmail.com, qemu Developers , Cameron Esfahani , Markus Armbruster , Roman Bolshakov , Alexander Graf , Phillip Tennen , Howard Spoelstra , hello@adns.io, Christian Schoenebeck , Eric Blake , =?UTF-8?Q?Philippe_Mathieu=2DDaud=C3=A9?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Fri, Jan 14, 2022 at 12:01 AM Vladislav Yaroshchuk wrote: > > Interaction with vmnet.framework in different modes > differs only on configuration stage, so we can create > common `send`, `receive`, etc. procedures and reuse them. > > vmnet.framework supports iov, but writing more than > one iov into vmnet interface fails with > 'VMNET_INVALID_ARGUMENT'. Collecting provided iovs into > one and passing it to vmnet works fine. That's the > reason why receive_iov() left unimplemented. But it still > works with good enough performance having .receive() > implemented only. > > Also, there is no way to unsubscribe from vmnet packages > receiving except registering and unregistering event > callback or simply drop packages just ignoring and > not processing them when related flag is set. Here we do > using the second way. > > Signed-off-by: Phillip Tennen > Signed-off-by: Vladislav Yaroshchuk > --- > net/vmnet-common.m | 313 +++++++++++++++++++++++++++++++++++++++++++++ > net/vmnet-shared.c | 83 +++++++++++- > net/vmnet_int.h | 23 ++++ > 3 files changed, 415 insertions(+), 4 deletions(-) > > diff --git a/net/vmnet-common.m b/net/vmnet-common.m > index 532d152840..45c983ac7f 100644 > --- a/net/vmnet-common.m > +++ b/net/vmnet-common.m > @@ -10,6 +10,8 @@ > */ > > #include "qemu/osdep.h" > +#include "qemu/main-loop.h" > +#include "qemu/log.h" > #include "qapi/qapi-types-net.h" > #include "vmnet_int.h" > #include "clients.h" > @@ -17,4 +19,315 @@ > #include "qapi/error.h" > > #include > +#include > > +#ifdef DEBUG > +#define D(x) x > +#define D_LOG(...) qemu_log(__VA_ARGS__) > +#else > +#define D(x) do { } while (0) > +#define D_LOG(...) do { } while (0) > +#endif > + > +typedef struct vmpktdesc vmpktdesc_t; > +typedef struct iovec iovec_t; > + > +static void vmnet_set_send_enabled(VmnetCommonState *s, bool enable) > +{ > + s->send_enabled = enable; > +} > + > + > +static void vmnet_send_completed(NetClientState *nc, ssize_t len) > +{ > + VmnetCommonState *s = DO_UPCAST(VmnetCommonState, nc, nc); > + vmnet_set_send_enabled(s, true); > +} > + > + > +static void vmnet_send(NetClientState *nc, > + interface_event_t event_id, > + xpc_object_t event) > +{ > + assert(event_id == VMNET_INTERFACE_PACKETS_AVAILABLE); > + > + VmnetCommonState *s; > + uint64_t packets_available; > + > + struct iovec *iov; > + struct vmpktdesc *packets; > + int pkt_cnt; > + int i; > + > + vmnet_return_t if_status; > + ssize_t size; > + > + s = DO_UPCAST(VmnetCommonState, nc, nc); > + > + packets_available = xpc_dictionary_get_uint64( > + event, > + vmnet_estimated_packets_available_key > + ); > + > + pkt_cnt = (packets_available < VMNET_PACKETS_LIMIT) ? > + packets_available : > + VMNET_PACKETS_LIMIT; > + > + > + iov = s->iov_buf; > + packets = s->packets_buf; > + > + for (i = 0; i < pkt_cnt; ++i) { > + packets[i].vm_pkt_size = s->max_packet_size; > + packets[i].vm_pkt_iovcnt = 1; > + packets[i].vm_flags = 0; > + } > + > + if_status = vmnet_read(s->vmnet_if, packets, &pkt_cnt); > + if (if_status != VMNET_SUCCESS) { > + error_printf("vmnet: read failed: %s\n", > + vmnet_status_map_str(if_status)); > + } > + qemu_mutex_lock_iothread(); > + for (i = 0; i < pkt_cnt; ++i) { > + size = qemu_send_packet_async(nc, > + iov[i].iov_base, > + packets[i].vm_pkt_size, > + vmnet_send_completed); > + if (size == 0) { > + vmnet_set_send_enabled(s, false); > + } else if (size < 0) { > + break; > + } > + } > + qemu_mutex_unlock_iothread(); > + > +} > + > + > +static void vmnet_register_event_callback(VmnetCommonState *s) > +{ > + dispatch_queue_t avail_pkt_q = dispatch_queue_create( > + "org.qemu.vmnet.if_queue", > + DISPATCH_QUEUE_SERIAL > + ); > + > + vmnet_interface_set_event_callback( > + s->vmnet_if, > + VMNET_INTERFACE_PACKETS_AVAILABLE, > + avail_pkt_q, > + ^(interface_event_t event_id, xpc_object_t event) { > + if (s->send_enabled) { > + vmnet_send(&s->nc, event_id, event); > + } > + }); > +} > + > + > +static void vmnet_bufs_init(VmnetCommonState *s) > +{ > + int i; > + struct vmpktdesc *packets; > + struct iovec *iov; > + > + packets = s->packets_buf; > + iov = s->iov_buf; > + > + for (i = 0; i < VMNET_PACKETS_LIMIT; ++i) { > + iov[i].iov_len = s->max_packet_size; > + iov[i].iov_base = g_malloc0(iov[i].iov_len); > + packets[i].vm_pkt_iov = iov + i; > + } > +} > + > + > +const char *vmnet_status_map_str(vmnet_return_t status) > +{ > + switch (status) { > + case VMNET_SUCCESS: > + return "success"; > + case VMNET_FAILURE: > + return "general failure"; > + case VMNET_MEM_FAILURE: > + return "memory allocation failure"; > + case VMNET_INVALID_ARGUMENT: > + return "invalid argument specified"; > + case VMNET_SETUP_INCOMPLETE: > + return "interface setup is not complete"; > + case VMNET_INVALID_ACCESS: > + return "invalid access, permission denied"; > + case VMNET_PACKET_TOO_BIG: > + return "packet size is larger than MTU"; > + case VMNET_BUFFER_EXHAUSTED: > + return "buffers exhausted in kernel"; > + case VMNET_TOO_MANY_PACKETS: > + return "packet count exceeds limit"; > +#if defined(MAC_OS_VERSION_11_0) && \ > + MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_VERSION_11_0 > + case VMNET_SHARING_SERVICE_BUSY: > + return "conflict, sharing service is in use"; > +#endif > + default: > + return "unknown vmnet error"; > + } > +} > + > + > +int vmnet_if_create(NetClientState *nc, > + xpc_object_t if_desc, > + Error **errp, > + void (*completion_callback)(xpc_object_t interface_param)) > +{ > + VmnetCommonState *s; > + > + dispatch_queue_t if_create_q; > + dispatch_semaphore_t if_created_sem; > + > + __block vmnet_return_t if_status; > + > + if_create_q = dispatch_queue_create("org.qemu.vmnet.create", > + DISPATCH_QUEUE_SERIAL); > + if_created_sem = dispatch_semaphore_create(0); > + > + xpc_dictionary_set_bool( > + if_desc, > + vmnet_allocate_mac_address_key, > + false > + ); > + > + D(D_LOG("vmnet.start.interface_desc:\n"); > + xpc_dictionary_apply(if_desc, > + ^bool(const char *k, xpc_object_t v) { > + char *desc = xpc_copy_description(v); > + D_LOG(" %s=%s\n", k, desc); > + free(desc); > + return true; > + })); > + > + s = DO_UPCAST(VmnetCommonState, nc, nc); > + s->vmnet_if = vmnet_start_interface( > + if_desc, > + if_create_q, > + ^(vmnet_return_t status, xpc_object_t interface_param) { > + if_status = status; > + if (status != VMNET_SUCCESS || !interface_param) { > + dispatch_semaphore_signal(if_created_sem); > + return; > + } > + > + D(D_LOG("vmnet.start.interface_param:\n"); > + xpc_dictionary_apply(interface_param, > + ^bool(const char *k, xpc_object_t v) { > + char *desc = xpc_copy_description(v); > + D_LOG(" %s=%s\n", k, desc); > + free(desc); > + return true; > + })); > + > + s->mtu = xpc_dictionary_get_uint64( > + interface_param, > + vmnet_mtu_key); > + s->max_packet_size = xpc_dictionary_get_uint64( > + interface_param, > + vmnet_max_packet_size_key); > + > + if (completion_callback) { > + completion_callback(interface_param); > + } > + dispatch_semaphore_signal(if_created_sem); > + }); > + > + if (s->vmnet_if == NULL) { > + error_setg(errp, "unable to create interface with requested params"); > + return -1; > + } > + > + dispatch_semaphore_wait(if_created_sem, DISPATCH_TIME_FOREVER); > + dispatch_release(if_create_q); > + > + if (if_status != VMNET_SUCCESS) { > + error_setg(errp, > + "cannot create vmnet interface: %s", > + vmnet_status_map_str(if_status)); > + return -1; > + } > + > + vmnet_register_event_callback(s); > + vmnet_bufs_init(s); > + vmnet_set_send_enabled(s, true); > + > + return 0; > +} > + > + > +ssize_t vmnet_receive_common(NetClientState *nc, > + const uint8_t *buf, > + size_t size) > +{ > + VmnetCommonState *s; > + vmpktdesc_t packet; > + iovec_t iov; > + int pkt_cnt; > + vmnet_return_t if_status; > + > + s = DO_UPCAST(VmnetCommonState, nc, nc); > + > + if (size > s->max_packet_size) { > + warn_report("vmnet: packet is too big, %zu > %llu\n", > + packet.vm_pkt_size, > + s->max_packet_size); > + return -1; > + } > + > + iov.iov_base = (char *) buf; > + iov.iov_len = size; > + > + packet.vm_pkt_iovcnt = 1; > + packet.vm_flags = 0; > + packet.vm_pkt_size = size; > + packet.vm_pkt_iov = &iov; > + > + pkt_cnt = 1; > + if_status = vmnet_write(s->vmnet_if, &packet, &pkt_cnt); > + > + if (if_status != VMNET_SUCCESS) { > + error_report("vmnet: write error: %s\n", > + vmnet_status_map_str(if_status)); > + } > + > + if (if_status == VMNET_SUCCESS && pkt_cnt) { > + return size; > + } > + return 0; > +} > + > + > +void vmnet_cleanup_common(NetClientState *nc) > +{ > + VmnetCommonState *s; > + dispatch_queue_t if_destroy_q; > + > + s = DO_UPCAST(VmnetCommonState, nc, nc); > + > + qemu_purge_queued_packets(nc); > + vmnet_set_send_enabled(s, false); > + > + if (s->vmnet_if == NULL) { > + return; > + } > + > + if_destroy_q = dispatch_queue_create( > + "org.qemu.vmnet.destroy", > + DISPATCH_QUEUE_SERIAL > + ); > + > + vmnet_stop_interface( > + s->vmnet_if, > + if_destroy_q, > + ^(vmnet_return_t status) { > + }); > + > + for (int i = 0; i < VMNET_PACKETS_LIMIT; ++i) { > + g_free(s->iov_buf[i].iov_base); > + } > +} > diff --git a/net/vmnet-shared.c b/net/vmnet-shared.c > index f8c4a4f3b8..0896a41d1a 100644 > --- a/net/vmnet-shared.c > +++ b/net/vmnet-shared.c > @@ -10,16 +10,91 @@ > > #include "qemu/osdep.h" > #include "qapi/qapi-types-net.h" > +#include "qapi/error.h" > #include "vmnet_int.h" > #include "clients.h" > -#include "qemu/error-report.h" > -#include "qapi/error.h" > > #include > > +typedef struct VmnetSharedState { > + VmnetCommonState cs; > +} VmnetSharedState; > + > + > +static xpc_object_t create_if_desc(const Netdev *netdev, Error **errp) > +{ > + const NetdevVmnetSharedOptions *options = &(netdev->u.vmnet_shared); > + xpc_object_t if_desc = xpc_dictionary_create(NULL, NULL, 0); > + > + xpc_dictionary_set_uint64( > + if_desc, > + vmnet_operation_mode_key, > + VMNET_SHARED_MODE > + ); > + > +#if defined(MAC_OS_VERSION_11_0) && \ > + MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_VERSION_11_0 > + xpc_dictionary_set_bool( > + if_desc, > + vmnet_enable_isolation_key, > + options->isolated > + ); > +#else > + if (options->has_isolated) { > + error_setg(errp, > + "vmnet-shared.isolated feature is " > + "unavailable: outdated vmnet.framework API"); > + } > +#endif Instead of MAC_OS_X_VERSION_MAX_ALLOWED, MAC_OS_X_VERSION_MIN_REQUIRED should be used here. MAC_OS_X_VERSION_MIN_REQUIRED defines the lower bound of the version range supported by the build while MAC_OS_X_VERSION_MAX_ALLOWED defines the upper bound. Since the build referencing vmnet_enable_isolation_key would not properly work on macOS <11.0, the lower bound must be checked. MacOSX.sdk/usr/include/AvailabilityMacros.h has a more detailed explanation. I'm CCing people receiving macOS 12 support patch series since we had similar discussions there too. https://lore.kernel.org/all/20220109170612.574104-1-f4bug@amsat.org/ Regards, Akihiko Odaki > + > + if (options->has_nat66_prefix) { > + xpc_dictionary_set_string(if_desc, > + vmnet_nat66_prefix_key, > + options->nat66_prefix); > + } > + > + if (options->has_start_address || > + options->has_end_address || > + options->has_subnet_mask) { > + > + if (options->has_start_address && > + options->has_end_address && > + options->has_subnet_mask) { > + > + xpc_dictionary_set_string(if_desc, > + vmnet_start_address_key, > + options->start_address); > + xpc_dictionary_set_string(if_desc, > + vmnet_end_address_key, > + options->end_address); > + xpc_dictionary_set_string(if_desc, > + vmnet_subnet_mask_key, > + options->subnet_mask); > + } else { > + error_setg( > + errp, > + "'start-address', 'end-address', 'subnet-mask' " > + "should be provided together" > + ); > + } > + } > + > + return if_desc; > +} > + > +static NetClientInfo net_vmnet_shared_info = { > + .type = NET_CLIENT_DRIVER_VMNET_SHARED, > + .size = sizeof(VmnetSharedState), > + .receive = vmnet_receive_common, > + .cleanup = vmnet_cleanup_common, > +}; > + > int net_init_vmnet_shared(const Netdev *netdev, const char *name, > NetClientState *peer, Error **errp) > { > - error_setg(errp, "vmnet-shared is not implemented yet"); > - return -1; > + NetClientState *nc = qemu_new_net_client(&net_vmnet_shared_info, > + peer, "vmnet-shared", name); > + xpc_object_t if_desc = create_if_desc(netdev, errp); > + > + return vmnet_if_create(nc, if_desc, errp, NULL); > } > diff --git a/net/vmnet_int.h b/net/vmnet_int.h > index c5982259a4..3979fe4678 100644 > --- a/net/vmnet_int.h > +++ b/net/vmnet_int.h > @@ -16,10 +16,33 @@ > > #include > > +#define VMNET_PACKETS_LIMIT 50 > + > typedef struct VmnetCommonState { > NetClientState nc; > + interface_ref vmnet_if; > + > + bool send_enabled; > + > + uint64_t mtu; > + uint64_t max_packet_size; > + > + struct vmpktdesc packets_buf[VMNET_PACKETS_LIMIT]; > + struct iovec iov_buf[VMNET_PACKETS_LIMIT]; > > } VmnetCommonState; > > +const char *vmnet_status_map_str(vmnet_return_t status); > + > +int vmnet_if_create(NetClientState *nc, > + xpc_object_t if_desc, > + Error **errp, > + void (*completion_callback)(xpc_object_t interface_param)); > + > +ssize_t vmnet_receive_common(NetClientState *nc, > + const uint8_t *buf, > + size_t size); > + > +void vmnet_cleanup_common(NetClientState *nc); > > #endif /* VMNET_INT_H */ > -- > 2.23.0 >