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{
    "id": 834104,
    "url": "http://patchwork.ozlabs.org/api/1.2/patches/834104/?format=api",
    "web_url": "http://patchwork.ozlabs.org/project/netdev/patch/20171103205630.1083-4-jakub.kicinski@netronome.com/",
    "project": {
        "id": 7,
        "url": "http://patchwork.ozlabs.org/api/1.2/projects/7/?format=api",
        "name": "Linux network development",
        "link_name": "netdev",
        "list_id": "netdev.vger.kernel.org",
        "list_email": "netdev@vger.kernel.org",
        "web_url": null,
        "scm_url": null,
        "webscm_url": null,
        "list_archive_url": "",
        "list_archive_url_format": "",
        "commit_url_format": ""
    },
    "msgid": "<20171103205630.1083-4-jakub.kicinski@netronome.com>",
    "list_archive_url": null,
    "date": "2017-11-03T20:56:18",
    "name": "[net-next,v2,03/15] bpf: report offload info to user space",
    "commit_ref": null,
    "pull_url": null,
    "state": "accepted",
    "archived": true,
    "hash": "fcd3abcef9e80f5ab53784cd8229a327ceffd75a",
    "submitter": {
        "id": 67484,
        "url": "http://patchwork.ozlabs.org/api/1.2/people/67484/?format=api",
        "name": "Jakub Kicinski",
        "email": "jakub.kicinski@netronome.com"
    },
    "delegate": {
        "id": 34,
        "url": "http://patchwork.ozlabs.org/api/1.2/users/34/?format=api",
        "username": "davem",
        "first_name": "David",
        "last_name": "Miller",
        "email": "davem@davemloft.net"
    },
    "mbox": "http://patchwork.ozlabs.org/project/netdev/patch/20171103205630.1083-4-jakub.kicinski@netronome.com/mbox/",
    "series": [
        {
            "id": 11839,
            "url": "http://patchwork.ozlabs.org/api/1.2/series/11839/?format=api",
            "web_url": "http://patchwork.ozlabs.org/project/netdev/list/?series=11839",
            "date": "2017-11-03T20:56:15",
            "name": "bpf: add offload as a first class citizen",
            "version": 2,
            "mbox": "http://patchwork.ozlabs.org/series/11839/mbox/"
        }
    ],
    "comments": "http://patchwork.ozlabs.org/api/patches/834104/comments/",
    "check": "pending",
    "checks": "http://patchwork.ozlabs.org/api/patches/834104/checks/",
    "tags": {},
    "related": [],
    "headers": {
        "Return-Path": "<netdev-owner@vger.kernel.org>",
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        "X-Received": "by 10.98.131.68 with SMTP id h65mr8941413pfe.148.1509742607261; \n\tFri, 03 Nov 2017 13:56:47 -0700 (PDT)",
        "From": "Jakub Kicinski <jakub.kicinski@netronome.com>",
        "To": "netdev@vger.kernel.org",
        "Cc": "oss-drivers@netronome.com, alexei.starovoitov@gmail.com,\n\tdaniel@iogearbox.net, Jakub Kicinski <jakub.kicinski@netronome.com>",
        "Subject": "[PATCH net-next v2 03/15] bpf: report offload info to user space",
        "Date": "Fri,  3 Nov 2017 13:56:18 -0700",
        "Message-Id": "<20171103205630.1083-4-jakub.kicinski@netronome.com>",
        "X-Mailer": "git-send-email 2.14.1",
        "In-Reply-To": "<20171103205630.1083-1-jakub.kicinski@netronome.com>",
        "References": "<20171103205630.1083-1-jakub.kicinski@netronome.com>",
        "Sender": "netdev-owner@vger.kernel.org",
        "Precedence": "bulk",
        "List-ID": "<netdev.vger.kernel.org>",
        "X-Mailing-List": "netdev@vger.kernel.org"
    },
    "content": "Extend struct bpf_prog_info to contain information about program\nbeing bound to a device.  Since the netdev may get destroyed while\nprogram still exists we need a flag to indicate the program is\nloaded for a device, even if the device is gone.\n\nSigned-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>\nReviewed-by: Simon Horman <simon.horman@netronome.com>\nReviewed-by: Quentin Monnet <quentin.monnet@netronome.com>\n---\n include/linux/bpf.h      |  1 +\n include/uapi/linux/bpf.h |  6 ++++++\n kernel/bpf/offload.c     | 12 ++++++++++++\n kernel/bpf/syscall.c     |  5 +++++\n 4 files changed, 24 insertions(+)",
    "diff": "diff --git a/include/linux/bpf.h b/include/linux/bpf.h\nindex e45d43f9ec92..98bacd0fa5cc 100644\n--- a/include/linux/bpf.h\n+++ b/include/linux/bpf.h\n@@ -506,6 +506,7 @@ static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,\n \n int bpf_prog_offload_compile(struct bpf_prog *prog);\n void bpf_prog_offload_destroy(struct bpf_prog *prog);\n+u32 bpf_prog_offload_ifindex(struct bpf_prog *prog);\n \n #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)\n int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);\ndiff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h\nindex 727a3dba13e6..e92f62cf933a 100644\n--- a/include/uapi/linux/bpf.h\n+++ b/include/uapi/linux/bpf.h\n@@ -894,6 +894,10 @@ enum sk_action {\n \n #define BPF_TAG_SIZE\t8\n \n+enum bpf_prog_status {\n+\tBPF_PROG_STATUS_DEV_BOUND\t= (1 << 0),\n+};\n+\n struct bpf_prog_info {\n \t__u32 type;\n \t__u32 id;\n@@ -907,6 +911,8 @@ struct bpf_prog_info {\n \t__u32 nr_map_ids;\n \t__aligned_u64 map_ids;\n \tchar name[BPF_OBJ_NAME_LEN];\n+\t__u32 ifindex;\n+\t__u32 status;\n } __attribute__((aligned(8)));\n \n struct bpf_map_info {\ndiff --git a/kernel/bpf/offload.c b/kernel/bpf/offload.c\nindex 5553e0e2f8b1..2816feb38be1 100644\n--- a/kernel/bpf/offload.c\n+++ b/kernel/bpf/offload.c\n@@ -144,6 +144,18 @@ int bpf_prog_offload_compile(struct bpf_prog *prog)\n \treturn bpf_prog_offload_translate(prog);\n }\n \n+u32 bpf_prog_offload_ifindex(struct bpf_prog *prog)\n+{\n+\tstruct bpf_dev_offload *offload = prog->aux->offload;\n+\tu32 ifindex;\n+\n+\trtnl_lock();\n+\tifindex = offload->netdev ? offload->netdev->ifindex : 0;\n+\trtnl_unlock();\n+\n+\treturn ifindex;\n+}\n+\n const struct bpf_prog_ops bpf_offload_prog_ops = {\n };\n \ndiff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c\nindex 1574b9f0f24e..3217c20ea91b 100644\n--- a/kernel/bpf/syscall.c\n+++ b/kernel/bpf/syscall.c\n@@ -1592,6 +1592,11 @@ static int bpf_prog_get_info_by_fd(struct bpf_prog *prog,\n \t\t\treturn -EFAULT;\n \t}\n \n+\tif (bpf_prog_is_dev_bound(prog->aux)) {\n+\t\tinfo.status |= BPF_PROG_STATUS_DEV_BOUND;\n+\t\tinfo.ifindex = bpf_prog_offload_ifindex(prog);\n+\t}\n+\n done:\n \tif (copy_to_user(uinfo, &info, info_len) ||\n \t    put_user(info_len, &uattr->info.info_len))\n",
    "prefixes": [
        "net-next",
        "v2",
        "03/15"
    ]
}