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{
    "id": 806597,
    "url": "http://patchwork.ozlabs.org/api/patches/806597/?format=api",
    "web_url": "http://patchwork.ozlabs.org/project/netdev/patch/20170828141201.14143.84669.stgit@john-Precision-Tower-5810/",
    "project": {
        "id": 7,
        "url": "http://patchwork.ozlabs.org/api/projects/7/?format=api",
        "name": "Linux network development",
        "link_name": "netdev",
        "list_id": "netdev.vger.kernel.org",
        "list_email": "netdev@vger.kernel.org",
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    "msgid": "<20170828141201.14143.84669.stgit@john-Precision-Tower-5810>",
    "list_archive_url": null,
    "date": "2017-08-28T14:12:01",
    "name": "[net-next,7/9] bpf: sockmap indicate sock events to listeners",
    "commit_ref": null,
    "pull_url": null,
    "state": "accepted",
    "archived": true,
    "hash": "5b0538c8e6564620223b9ee8da07ef0750e82b8b",
    "submitter": {
        "id": 20028,
        "url": "http://patchwork.ozlabs.org/api/people/20028/?format=api",
        "name": "John Fastabend",
        "email": "john.fastabend@gmail.com"
    },
    "delegate": {
        "id": 34,
        "url": "http://patchwork.ozlabs.org/api/users/34/?format=api",
        "username": "davem",
        "first_name": "David",
        "last_name": "Miller",
        "email": "davem@davemloft.net"
    },
    "mbox": "http://patchwork.ozlabs.org/project/netdev/patch/20170828141201.14143.84669.stgit@john-Precision-Tower-5810/mbox/",
    "series": [
        {
            "id": 179,
            "url": "http://patchwork.ozlabs.org/api/series/179/?format=api",
            "web_url": "http://patchwork.ozlabs.org/project/netdev/list/?series=179",
            "date": "2017-08-28T14:09:45",
            "name": "sockmap UAPI updates and fixes",
            "version": 1,
            "mbox": "http://patchwork.ozlabs.org/series/179/mbox/"
        }
    ],
    "comments": "http://patchwork.ozlabs.org/api/patches/806597/comments/",
    "check": "pending",
    "checks": "http://patchwork.ozlabs.org/api/patches/806597/checks/",
    "tags": {},
    "related": [],
    "headers": {
        "Return-Path": "<netdev-owner@vger.kernel.org>",
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        "X-Received": "by 10.84.216.71 with SMTP id f7mr918751plj.123.1503929535181;\n\tMon, 28 Aug 2017 07:12:15 -0700 (PDT)",
        "Subject": "[net-next PATCH 7/9] bpf: sockmap indicate sock events to listeners",
        "From": "John Fastabend <john.fastabend@gmail.com>",
        "To": "ast@kernel.org, daniel@iogearbox.net, davem@davemloft.net",
        "Cc": "netdev@vger.kernel.org, john.fastabend@gmail.com",
        "Date": "Mon, 28 Aug 2017 07:12:01 -0700",
        "Message-ID": "<20170828141201.14143.84669.stgit@john-Precision-Tower-5810>",
        "In-Reply-To": "<20170828140850.14143.83953.stgit@john-Precision-Tower-5810>",
        "References": "<20170828140850.14143.83953.stgit@john-Precision-Tower-5810>",
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        "Sender": "netdev-owner@vger.kernel.org",
        "Precedence": "bulk",
        "List-ID": "<netdev.vger.kernel.org>",
        "X-Mailing-List": "netdev@vger.kernel.org"
    },
    "content": "After userspace pushes sockets into a sockmap it may not be receiving\ndata (assuming stream_{parser|verdict} programs are attached). But, it\nmay still want to manage the socks. A common pattern is to poll/select\nfor a POLLRDHUP event so we can close the sock.\n\nThis patch adds the logic to wake up these listeners.\n\nAlso add TCP_SYN_SENT to the list of events to handle. We don't want\nto break the connection just because we happen to be in this state.\n\nSigned-off-by: John Fastabend <john.fastabend@gmail.com>\n---\n kernel/bpf/sockmap.c |    6 ++++++\n 1 file changed, 6 insertions(+)",
    "diff": "diff --git a/kernel/bpf/sockmap.c b/kernel/bpf/sockmap.c\nindex 38bf4e4..bcc326a 100644\n--- a/kernel/bpf/sockmap.c\n+++ b/kernel/bpf/sockmap.c\n@@ -162,6 +162,7 @@ static void smap_state_change(struct sock *sk)\n {\n \tstruct smap_psock_map_entry *e, *tmp;\n \tstruct smap_psock *psock;\n+\tstruct socket_wq *wq;\n \tstruct sock *osk;\n \n \trcu_read_lock();\n@@ -171,6 +172,7 @@ static void smap_state_change(struct sock *sk)\n \t * is established.\n \t */\n \tswitch (sk->sk_state) {\n+\tcase TCP_SYN_SENT:\n \tcase TCP_SYN_RECV:\n \tcase TCP_ESTABLISHED:\n \t\tbreak;\n@@ -208,6 +210,10 @@ static void smap_state_change(struct sock *sk)\n \t\tsmap_report_sk_error(psock, EPIPE);\n \t\tbreak;\n \t}\n+\n+\twq = rcu_dereference(sk->sk_wq);\n+\tif (skwq_has_sleeper(wq))\n+\t\twake_up_interruptible_all(&wq->wait);\n \trcu_read_unlock();\n }\n \n",
    "prefixes": [
        "net-next",
        "7/9"
    ]
}