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{
    "id": 1525726,
    "url": "http://patchwork.ozlabs.org/api/patches/1525726/",
    "web_url": "http://patchwork.ozlabs.org/project/openvswitch/patch/7bb0004b2c88f817fd7cf2bedc886cb4aa659cba.1631094144.git.grive@u256.net/",
    "project": {
        "id": 47,
        "url": "http://patchwork.ozlabs.org/api/projects/47/",
        "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",
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        "list_archive_url_format": "",
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    },
    "msgid": "<7bb0004b2c88f817fd7cf2bedc886cb4aa659cba.1631094144.git.grive@u256.net>",
    "list_archive_url": null,
    "date": "2021-09-08T09:47:42",
    "name": "[ovs-dev,v5,18/27] dpif-netdev: Introduce tagged union of offload requests",
    "commit_ref": null,
    "pull_url": null,
    "state": "new",
    "archived": false,
    "hash": "742da8ad87839243a4f3ebd9c95cba599b2969b3",
    "submitter": {
        "id": 78795,
        "url": "http://patchwork.ozlabs.org/api/people/78795/",
        "name": "Gaëtan Rivet",
        "email": "grive@u256.net"
    },
    "delegate": null,
    "mbox": "http://patchwork.ozlabs.org/project/openvswitch/patch/7bb0004b2c88f817fd7cf2bedc886cb4aa659cba.1631094144.git.grive@u256.net/mbox/",
    "series": [
        {
            "id": 261424,
            "url": "http://patchwork.ozlabs.org/api/series/261424/",
            "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/1525726/comments/",
    "check": "success",
    "checks": "http://patchwork.ozlabs.org/api/patches/1525726/checks/",
    "tags": {},
    "related": [],
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        "From": "Gaetan Rivet <grive@u256.net>",
        "To": "ovs-dev@openvswitch.org",
        "Date": "Wed,  8 Sep 2021 11:47:42 +0200",
        "Message-Id": "\n <7bb0004b2c88f817fd7cf2bedc886cb4aa659cba.1631094144.git.grive@u256.net>",
        "X-Mailer": "git-send-email 2.31.1",
        "In-Reply-To": "<cover.1631094144.git.grive@u256.net>",
        "References": "<cover.1631094144.git.grive@u256.net>",
        "MIME-Version": "1.0",
        "Cc": "Maxime Coquelin <maxime.coquelin@redhat.com>",
        "Subject": "[ovs-dev] [PATCH v5 18/27] dpif-netdev: Introduce tagged union of\n\toffload requests",
        "X-BeenThere": "ovs-dev@openvswitch.org",
        "X-Mailman-Version": "2.1.15",
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        "List-Id": "<ovs-dev.openvswitch.org>",
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    },
    "content": "Offload requests are currently only supporting flow offloads.\nAs a pre-step before supporting an offload flush request,\nmodify the layout of an offload request item, to become a tagged union.\n\nFuture offload types won't be forced to re-use the full flow offload\nstructure, which consumes a lot of memory.\n\nSigned-off-by: Gaetan Rivet <grive@u256.net>\nReviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>\n---\n lib/dpif-netdev.c | 137 ++++++++++++++++++++++++++++++++--------------\n 1 file changed, 96 insertions(+), 41 deletions(-)",
    "diff": "diff --git a/lib/dpif-netdev.c b/lib/dpif-netdev.c\nindex 24ecaa0a8..e0052a65b 100644\n--- a/lib/dpif-netdev.c\n+++ b/lib/dpif-netdev.c\n@@ -333,13 +333,17 @@ enum rxq_cycles_counter_type {\n     RXQ_N_CYCLES\n };\n \n+enum dp_offload_type {\n+    DP_OFFLOAD_FLOW,\n+};\n+\n enum {\n     DP_NETDEV_FLOW_OFFLOAD_OP_ADD,\n     DP_NETDEV_FLOW_OFFLOAD_OP_MOD,\n     DP_NETDEV_FLOW_OFFLOAD_OP_DEL,\n };\n \n-struct dp_offload_thread_item {\n+struct dp_offload_flow_item {\n     struct dp_netdev_pmd_thread *pmd;\n     struct dp_netdev_flow *flow;\n     int op;\n@@ -347,9 +351,17 @@ struct dp_offload_thread_item {\n     struct nlattr *actions;\n     size_t actions_len;\n     odp_port_t orig_in_port; /* Originating in_port for tnl flows. */\n-    long long int timestamp;\n+};\n+\n+union dp_offload_thread_data {\n+    struct dp_offload_flow_item flow;\n+};\n \n+struct dp_offload_thread_item {\n     struct ovs_list node;\n+    enum dp_offload_type type;\n+    long long int timestamp;\n+    union dp_offload_thread_data data[0];\n };\n \n struct dp_offload_thread {\n@@ -2538,34 +2550,55 @@ dp_netdev_alloc_flow_offload(struct dp_netdev_pmd_thread *pmd,\n                              struct dp_netdev_flow *flow,\n                              int op)\n {\n-    struct dp_offload_thread_item *offload;\n+    struct dp_offload_thread_item *item;\n+    struct dp_offload_flow_item *flow_offload;\n+\n+    item = xzalloc(sizeof *item + sizeof *flow_offload);\n+    flow_offload = &item->data->flow;\n+\n+    item->type = DP_OFFLOAD_FLOW;\n \n-    offload = xzalloc(sizeof(*offload));\n-    offload->pmd = pmd;\n-    offload->flow = flow;\n-    offload->op = op;\n+    flow_offload->pmd = pmd;\n+    flow_offload->flow = flow;\n+    flow_offload->op = op;\n \n     dp_netdev_flow_ref(flow);\n     dp_netdev_pmd_try_ref(pmd);\n \n-    return offload;\n+    return item;\n }\n \n static void\n dp_netdev_free_flow_offload__(struct dp_offload_thread_item *offload)\n {\n-    free(offload->actions);\n+    struct dp_offload_flow_item *flow_offload = &offload->data->flow;\n+\n+    free(flow_offload->actions);\n     free(offload);\n }\n \n static void\n dp_netdev_free_flow_offload(struct dp_offload_thread_item *offload)\n {\n-    dp_netdev_pmd_unref(offload->pmd);\n-    dp_netdev_flow_unref(offload->flow);\n+    struct dp_offload_flow_item *flow_offload = &offload->data->flow;\n+\n+    dp_netdev_pmd_unref(flow_offload->pmd);\n+    dp_netdev_flow_unref(flow_offload->flow);\n     ovsrcu_postpone(dp_netdev_free_flow_offload__, offload);\n }\n \n+static void\n+dp_netdev_free_offload(struct dp_offload_thread_item *offload)\n+{\n+    switch (offload->type) {\n+    case DP_OFFLOAD_FLOW:\n+        dp_netdev_free_flow_offload(offload);\n+        break;\n+    default:\n+        OVS_NOT_REACHED();\n+    };\n+}\n+\n static void\n dp_netdev_append_flow_offload(struct dp_offload_thread_item *offload)\n {\n@@ -2577,7 +2610,7 @@ dp_netdev_append_flow_offload(struct dp_offload_thread_item *offload)\n }\n \n static int\n-dp_netdev_flow_offload_del(struct dp_offload_thread_item *offload)\n+dp_netdev_flow_offload_del(struct dp_offload_flow_item *offload)\n {\n     return mark_to_flow_disassociate(offload->pmd, offload->flow);\n }\n@@ -2594,7 +2627,7 @@ dp_netdev_flow_offload_del(struct dp_offload_thread_item *offload)\n  * valid, thus only item 2 needed.\n  */\n static int\n-dp_netdev_flow_offload_put(struct dp_offload_thread_item *offload)\n+dp_netdev_flow_offload_put(struct dp_offload_flow_item *offload)\n {\n     struct dp_netdev_pmd_thread *pmd = offload->pmd;\n     struct dp_netdev_flow *flow = offload->flow;\n@@ -2672,6 +2705,35 @@ err_free:\n     return -1;\n }\n \n+static void\n+dp_offload_flow(struct dp_offload_thread_item *item)\n+{\n+    struct dp_offload_flow_item *flow_offload = &item->data->flow;\n+    const char *op;\n+    int ret;\n+\n+    switch (flow_offload->op) {\n+    case DP_NETDEV_FLOW_OFFLOAD_OP_ADD:\n+        op = \"add\";\n+        ret = dp_netdev_flow_offload_put(flow_offload);\n+        break;\n+    case DP_NETDEV_FLOW_OFFLOAD_OP_MOD:\n+        op = \"modify\";\n+        ret = dp_netdev_flow_offload_put(flow_offload);\n+        break;\n+    case DP_NETDEV_FLOW_OFFLOAD_OP_DEL:\n+        op = \"delete\";\n+        ret = dp_netdev_flow_offload_del(flow_offload);\n+        break;\n+    default:\n+        OVS_NOT_REACHED();\n+    }\n+\n+    VLOG_DBG(\"%s to %s netdev flow \"UUID_FMT,\n+             ret == 0 ? \"succeed\" : \"failed\", op,\n+             UUID_ARGS((struct uuid *) &flow_offload->flow->mega_ufid));\n+}\n+\n #define DP_NETDEV_OFFLOAD_QUIESCE_INTERVAL_US (10 * 1000) /* 10 ms */\n \n static void *\n@@ -2682,8 +2744,6 @@ dp_netdev_flow_offload_main(void *data OVS_UNUSED)\n     long long int latency_us;\n     long long int next_rcu;\n     long long int now;\n-    const char *op;\n-    int ret;\n \n     next_rcu = time_usec() + DP_NETDEV_OFFLOAD_QUIESCE_INTERVAL_US;\n     for (;;) {\n@@ -2700,18 +2760,9 @@ dp_netdev_flow_offload_main(void *data OVS_UNUSED)\n         offload = CONTAINER_OF(list, struct dp_offload_thread_item, node);\n         ovs_mutex_unlock(&dp_offload_thread.mutex);\n \n-        switch (offload->op) {\n-        case DP_NETDEV_FLOW_OFFLOAD_OP_ADD:\n-            op = \"add\";\n-            ret = dp_netdev_flow_offload_put(offload);\n-            break;\n-        case DP_NETDEV_FLOW_OFFLOAD_OP_MOD:\n-            op = \"modify\";\n-            ret = dp_netdev_flow_offload_put(offload);\n-            break;\n-        case DP_NETDEV_FLOW_OFFLOAD_OP_DEL:\n-            op = \"delete\";\n-            ret = dp_netdev_flow_offload_del(offload);\n+        switch (offload->type) {\n+        case DP_OFFLOAD_FLOW:\n+            dp_offload_flow(offload);\n             break;\n         default:\n             OVS_NOT_REACHED();\n@@ -2723,10 +2774,7 @@ dp_netdev_flow_offload_main(void *data OVS_UNUSED)\n         mov_avg_cma_update(&dp_offload_thread.cma, latency_us);\n         mov_avg_ema_update(&dp_offload_thread.ema, latency_us);\n \n-        VLOG_DBG(\"%s to %s netdev flow \"UUID_FMT,\n-                 ret == 0 ? \"succeed\" : \"failed\", op,\n-                 UUID_ARGS((struct uuid *) &offload->flow->mega_ufid));\n-        dp_netdev_free_flow_offload(offload);\n+        dp_netdev_free_offload(offload);\n \n         /* Do RCU synchronization at fixed interval. */\n         if (now > next_rcu) {\n@@ -2827,7 +2875,8 @@ queue_netdev_flow_put(struct dp_netdev_pmd_thread *pmd,\n                       const struct nlattr *actions, size_t actions_len,\n                       odp_port_t orig_in_port, int op)\n {\n-    struct dp_offload_thread_item *offload;\n+    struct dp_offload_thread_item *item;\n+    struct dp_offload_flow_item *flow_offload;\n \n     if (!netdev_is_flow_api_enabled()) {\n         return;\n@@ -2839,15 +2888,21 @@ queue_netdev_flow_put(struct dp_netdev_pmd_thread *pmd,\n         ovsthread_once_done(&offload_thread_once);\n     }\n \n-    offload = dp_netdev_alloc_flow_offload(pmd, flow, op);\n-    offload->match = *match;\n-    offload->actions = xmalloc(actions_len);\n-    memcpy(offload->actions, actions, actions_len);\n-    offload->actions_len = actions_len;\n-    offload->orig_in_port = orig_in_port;\n-\n-    offload->timestamp = pmd->ctx.now;\n-    dp_netdev_append_flow_offload(offload);\n+    if (flow->mark != INVALID_FLOW_MARK) {\n+        op = DP_NETDEV_FLOW_OFFLOAD_OP_MOD;\n+    } else {\n+        op = DP_NETDEV_FLOW_OFFLOAD_OP_ADD;\n+    }\n+    item = dp_netdev_alloc_flow_offload(pmd, flow, op);\n+    flow_offload = &item->data->flow;\n+    flow_offload->match = *match;\n+    flow_offload->actions = xmalloc(actions_len);\n+    memcpy(flow_offload->actions, actions, actions_len);\n+    flow_offload->actions_len = actions_len;\n+    flow_offload->orig_in_port = orig_in_port;\n+\n+    item->timestamp = pmd->ctx.now;\n+    dp_netdev_append_flow_offload(item);\n }\n \n static void\n",
    "prefixes": [
        "ovs-dev",
        "v5",
        "18/27"
    ]
}