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GET /api/patches/1525713/?format=api
{ "id": 1525713, "url": "http://patchwork.ozlabs.org/api/patches/1525713/?format=api", "web_url": "http://patchwork.ozlabs.org/project/openvswitch/patch/5686a23e40e8eb893740386c3c4bba000f593f02.1631094144.git.grive@u256.net/", "project": { "id": 47, "url": "http://patchwork.ozlabs.org/api/projects/47/?format=api", "name": "Open vSwitch", "link_name": "openvswitch", "list_id": "ovs-dev.openvswitch.org", "list_email": "ovs-dev@openvswitch.org", "web_url": "http://openvswitch.org/", "scm_url": "git@github.com:openvswitch/ovs.git", "webscm_url": "https://github.com/openvswitch/ovs", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<5686a23e40e8eb893740386c3c4bba000f593f02.1631094144.git.grive@u256.net>", "list_archive_url": null, "date": "2021-09-08T09:47:29", "name": "[ovs-dev,v5,05/27] netdev-offload-dpdk: Use per-netdev offload metadata", "commit_ref": "adbd4301a249aa60519374476c362e474fede842", "pull_url": null, "state": "accepted", "archived": false, "hash": "59cf00ed79adb5dba731e54fc45a51d5d02444f8", "submitter": { "id": 78795, "url": "http://patchwork.ozlabs.org/api/people/78795/?format=api", "name": "Gaetan Rivet", "email": "grive@u256.net" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/openvswitch/patch/5686a23e40e8eb893740386c3c4bba000f593f02.1631094144.git.grive@u256.net/mbox/", "series": [ { "id": 261424, "url": "http://patchwork.ozlabs.org/api/series/261424/?format=api", "web_url": "http://patchwork.ozlabs.org/project/openvswitch/list/?series=261424", "date": "2021-09-08T09:47:24", "name": "dpif-netdev: Parallel offload processing", "version": 5, "mbox": "http://patchwork.ozlabs.org/series/261424/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/1525713/comments/", "check": "success", "checks": "http://patchwork.ozlabs.org/api/patches/1525713/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<ovs-dev-bounces@openvswitch.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "ovs-dev@openvswitch.org" ], "Delivered-To": [ "patchwork-incoming@bilbo.ozlabs.org", "ovs-dev@lists.linuxfoundation.org" ], "Authentication-Results": [ "ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n unprotected) header.d=u256.net header.i=@u256.net header.a=rsa-sha256\n header.s=fm2 header.b=YZg17u3Y;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n unprotected) header.d=messagingengine.com header.i=@messagingengine.com\n header.a=rsa-sha256 header.s=fm3 header.b=oWGjw/Ud;\n\tdkim-atps=neutral", "ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=openvswitch.org\n (client-ip=140.211.166.133; 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charset=\"us-ascii\"", "Content-Transfer-Encoding": "7bit", "Errors-To": "ovs-dev-bounces@openvswitch.org", "Sender": "\"dev\" <ovs-dev-bounces@openvswitch.org>" }, "content": "Add a per-netdev offload data field as part of netdev hw_info structure.\nUse this field in netdev-offload-dpdk to map offload metadata (ufid to\nrte_flow). Use flow API deinit ops to destroy the per-netdev metadata\nwhen deallocating a netdev. Use RCU primitives to ensure coherency\nduring port deletion.\n\nSigned-off-by: Gaetan Rivet <grive@u256.net>\nReviewed-by: Eli Britstein <elibr@nvidia.com>\nReviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>\n---\n lib/netdev-offload-dpdk.c | 126 +++++++++++++++++++++++++++++++++-----\n lib/netdev-offload.h | 2 +\n 2 files changed, 113 insertions(+), 15 deletions(-)", "diff": "diff --git a/lib/netdev-offload-dpdk.c b/lib/netdev-offload-dpdk.c\nindex b87a50b40..2d1e31ece 100644\n--- a/lib/netdev-offload-dpdk.c\n+++ b/lib/netdev-offload-dpdk.c\n@@ -28,6 +28,7 @@\n #include \"odp-util.h\"\n #include \"openvswitch/match.h\"\n #include \"openvswitch/vlog.h\"\n+#include \"ovs-rcu.h\"\n #include \"packets.h\"\n #include \"uuid.h\"\n \n@@ -54,7 +55,6 @@ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(600, 600);\n /*\n * A mapping from ufid to dpdk rte_flow.\n */\n-static struct cmap ufid_to_rte_flow = CMAP_INITIALIZER;\n \n struct ufid_to_rte_flow_data {\n struct cmap_node node;\n@@ -66,14 +66,81 @@ struct ufid_to_rte_flow_data {\n struct netdev *physdev;\n };\n \n+struct netdev_offload_dpdk_data {\n+ struct cmap ufid_to_rte_flow;\n+};\n+\n+static int\n+offload_data_init(struct netdev *netdev)\n+{\n+ struct netdev_offload_dpdk_data *data;\n+\n+ data = xzalloc(sizeof *data);\n+ cmap_init(&data->ufid_to_rte_flow);\n+\n+ ovsrcu_set(&netdev->hw_info.offload_data, (void *) data);\n+\n+ return 0;\n+}\n+\n+static void\n+offload_data_destroy__(struct netdev_offload_dpdk_data *data)\n+{\n+ free(data);\n+}\n+\n+static void\n+offload_data_destroy(struct netdev *netdev)\n+{\n+ struct netdev_offload_dpdk_data *data;\n+ struct ufid_to_rte_flow_data *node;\n+\n+ data = (struct netdev_offload_dpdk_data *)\n+ ovsrcu_get(void *, &netdev->hw_info.offload_data);\n+ if (data == NULL) {\n+ return;\n+ }\n+\n+ if (!cmap_is_empty(&data->ufid_to_rte_flow)) {\n+ VLOG_ERR(\"Incomplete flush: %s contains rte_flow elements\",\n+ netdev_get_name(netdev));\n+ }\n+\n+ CMAP_FOR_EACH (node, node, &data->ufid_to_rte_flow) {\n+ ovsrcu_postpone(free, node);\n+ }\n+\n+ cmap_destroy(&data->ufid_to_rte_flow);\n+ ovsrcu_postpone(offload_data_destroy__, data);\n+\n+ ovsrcu_set(&netdev->hw_info.offload_data, NULL);\n+}\n+\n+static struct cmap *\n+offload_data_map(struct netdev *netdev)\n+{\n+ struct netdev_offload_dpdk_data *data;\n+\n+ data = (struct netdev_offload_dpdk_data *)\n+ ovsrcu_get(void *, &netdev->hw_info.offload_data);\n+\n+ return data ? &data->ufid_to_rte_flow : NULL;\n+}\n+\n /* Find rte_flow with @ufid. */\n static struct ufid_to_rte_flow_data *\n-ufid_to_rte_flow_data_find(const ovs_u128 *ufid, bool warn)\n+ufid_to_rte_flow_data_find(struct netdev *netdev,\n+ const ovs_u128 *ufid, bool warn)\n {\n size_t hash = hash_bytes(ufid, sizeof *ufid, 0);\n struct ufid_to_rte_flow_data *data;\n+ struct cmap *map = offload_data_map(netdev);\n+\n+ if (!map) {\n+ return NULL;\n+ }\n \n- CMAP_FOR_EACH_WITH_HASH (data, node, hash, &ufid_to_rte_flow) {\n+ CMAP_FOR_EACH_WITH_HASH (data, node, hash, map) {\n if (ovs_u128_equals(*ufid, data->ufid)) {\n return data;\n }\n@@ -93,8 +160,15 @@ ufid_to_rte_flow_associate(const ovs_u128 *ufid, struct netdev *netdev,\n bool actions_offloaded)\n {\n size_t hash = hash_bytes(ufid, sizeof *ufid, 0);\n- struct ufid_to_rte_flow_data *data = xzalloc(sizeof *data);\n+ struct cmap *map = offload_data_map(netdev);\n struct ufid_to_rte_flow_data *data_prev;\n+ struct ufid_to_rte_flow_data *data;\n+\n+ if (!map) {\n+ return NULL;\n+ }\n+\n+ data = xzalloc(sizeof *data);\n \n /*\n * We should not simply overwrite an existing rte flow.\n@@ -102,7 +176,7 @@ ufid_to_rte_flow_associate(const ovs_u128 *ufid, struct netdev *netdev,\n * Thus, if following assert triggers, something is wrong:\n * the rte_flow is not destroyed.\n */\n- data_prev = ufid_to_rte_flow_data_find(ufid, false);\n+ data_prev = ufid_to_rte_flow_data_find(netdev, ufid, false);\n if (data_prev) {\n ovs_assert(data_prev->rte_flow == NULL);\n }\n@@ -113,8 +187,7 @@ ufid_to_rte_flow_associate(const ovs_u128 *ufid, struct netdev *netdev,\n data->rte_flow = rte_flow;\n data->actions_offloaded = actions_offloaded;\n \n- cmap_insert(&ufid_to_rte_flow,\n- CONST_CAST(struct cmap_node *, &data->node), hash);\n+ cmap_insert(map, CONST_CAST(struct cmap_node *, &data->node), hash);\n return data;\n }\n \n@@ -122,9 +195,13 @@ static inline void\n ufid_to_rte_flow_disassociate(struct ufid_to_rte_flow_data *data)\n {\n size_t hash = hash_bytes(&data->ufid, sizeof data->ufid, 0);\n+ struct cmap *map = offload_data_map(data->netdev);\n+\n+ if (!map) {\n+ return;\n+ }\n \n- cmap_remove(&ufid_to_rte_flow,\n- CONST_CAST(struct cmap_node *, &data->node), hash);\n+ cmap_remove(map, CONST_CAST(struct cmap_node *, &data->node), hash);\n if (data->netdev != data->physdev) {\n netdev_close(data->netdev);\n }\n@@ -1952,7 +2029,7 @@ netdev_offload_dpdk_flow_put(struct netdev *netdev, struct match *match,\n * Here destroy the old rte flow first before adding a new one.\n * Keep the stats for the newly created rule.\n */\n- rte_flow_data = ufid_to_rte_flow_data_find(ufid, false);\n+ rte_flow_data = ufid_to_rte_flow_data_find(netdev, ufid, false);\n if (rte_flow_data && rte_flow_data->rte_flow) {\n struct get_netdev_odp_aux aux = {\n .netdev = rte_flow_data->physdev,\n@@ -1994,7 +2071,7 @@ netdev_offload_dpdk_flow_del(struct netdev *netdev OVS_UNUSED,\n {\n struct ufid_to_rte_flow_data *rte_flow_data;\n \n- rte_flow_data = ufid_to_rte_flow_data_find(ufid, true);\n+ rte_flow_data = ufid_to_rte_flow_data_find(netdev, ufid, true);\n if (!rte_flow_data || !rte_flow_data->rte_flow) {\n return -1;\n }\n@@ -2008,6 +2085,8 @@ netdev_offload_dpdk_flow_del(struct netdev *netdev OVS_UNUSED,\n static int\n netdev_offload_dpdk_init_flow_api(struct netdev *netdev)\n {\n+ int ret = EOPNOTSUPP;\n+\n if (netdev_vport_is_vport_class(netdev->netdev_class)\n && !strcmp(netdev_get_dpif_type(netdev), \"system\")) {\n VLOG_DBG(\"%s: vport belongs to the system datapath. Skipping.\",\n@@ -2015,7 +2094,19 @@ netdev_offload_dpdk_init_flow_api(struct netdev *netdev)\n return EOPNOTSUPP;\n }\n \n- return netdev_dpdk_flow_api_supported(netdev) ? 0 : EOPNOTSUPP;\n+ if (netdev_dpdk_flow_api_supported(netdev)) {\n+ ret = offload_data_init(netdev);\n+ }\n+\n+ return ret;\n+}\n+\n+static void\n+netdev_offload_dpdk_uninit_flow_api(struct netdev *netdev)\n+{\n+ if (netdev_dpdk_flow_api_supported(netdev)) {\n+ offload_data_destroy(netdev);\n+ }\n }\n \n static int\n@@ -2032,7 +2123,7 @@ netdev_offload_dpdk_flow_get(struct netdev *netdev,\n struct rte_flow_error error;\n int ret = 0;\n \n- rte_flow_data = ufid_to_rte_flow_data_find(ufid, false);\n+ rte_flow_data = ufid_to_rte_flow_data_find(netdev, ufid, false);\n if (!rte_flow_data || !rte_flow_data->rte_flow) {\n ret = -1;\n goto out;\n@@ -2068,13 +2159,17 @@ out:\n static int\n netdev_offload_dpdk_flow_flush(struct netdev *netdev)\n {\n+ struct cmap *map = offload_data_map(netdev);\n struct ufid_to_rte_flow_data *data;\n \n- CMAP_FOR_EACH (data, node, &ufid_to_rte_flow) {\n+ if (!map) {\n+ return -1;\n+ }\n+\n+ CMAP_FOR_EACH (data, node, map) {\n if (data->netdev != netdev && data->physdev != netdev) {\n continue;\n }\n-\n netdev_offload_dpdk_flow_destroy(data);\n }\n \n@@ -2235,6 +2330,7 @@ const struct netdev_flow_api netdev_offload_dpdk = {\n .flow_put = netdev_offload_dpdk_flow_put,\n .flow_del = netdev_offload_dpdk_flow_del,\n .init_flow_api = netdev_offload_dpdk_init_flow_api,\n+ .uninit_flow_api = netdev_offload_dpdk_uninit_flow_api,\n .flow_get = netdev_offload_dpdk_flow_get,\n .flow_flush = netdev_offload_dpdk_flow_flush,\n .hw_miss_packet_recover = netdev_offload_dpdk_hw_miss_packet_recover,\ndiff --git a/lib/netdev-offload.h b/lib/netdev-offload.h\nindex e7fcedae9..b0a0ead0f 100644\n--- a/lib/netdev-offload.h\n+++ b/lib/netdev-offload.h\n@@ -20,6 +20,7 @@\n \n #include \"openvswitch/netdev.h\"\n #include \"openvswitch/types.h\"\n+#include \"ovs-rcu.h\"\n #include \"packets.h\"\n #include \"flow.h\"\n \n@@ -45,6 +46,7 @@ struct netdev_hw_info {\n bool oor;\t\t/* Out of Offload Resources ? */\n int offload_count; /* Pending (non-offloaded) flow count */\n int pending_count; /* Offloaded flow count */\n+ OVSRCU_TYPE(void *) offload_data; /* Offload metadata. */\n };\n \n enum hw_info_type {\n", "prefixes": [ "ovs-dev", "v5", "05/27" ] }