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{
    "id": 805997,
    "url": "http://patchwork.ozlabs.org/api/patches/805997/?format=api",
    "web_url": "http://patchwork.ozlabs.org/project/netdev/patch/1503687941-626-6-git-send-email-dsahern@gmail.com/",
    "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",
        "web_url": null,
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    "msgid": "<1503687941-626-6-git-send-email-dsahern@gmail.com>",
    "list_archive_url": null,
    "date": "2017-08-25T19:05:38",
    "name": "[v2,net-next,5/8] samples/bpf: Add detach option to test_cgrp2_sock",
    "commit_ref": null,
    "pull_url": null,
    "state": "deferred",
    "archived": true,
    "hash": "6f9014398de742cfa66b9a16aa2585a1c07ded10",
    "submitter": {
        "id": 6918,
        "url": "http://patchwork.ozlabs.org/api/people/6918/?format=api",
        "name": "David Ahern",
        "email": "dsahern@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/1503687941-626-6-git-send-email-dsahern@gmail.com/mbox/",
    "series": [],
    "comments": "http://patchwork.ozlabs.org/api/patches/805997/comments/",
    "check": "pending",
    "checks": "http://patchwork.ozlabs.org/api/patches/805997/checks/",
    "tags": {},
    "related": [],
    "headers": {
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        "X-Received": "by 10.84.167.2 with SMTP id c2mr11778990plb.368.1503687955203;\n\tFri, 25 Aug 2017 12:05:55 -0700 (PDT)",
        "From": "David Ahern <dsahern@gmail.com>",
        "To": "netdev@vger.kernel.org, daniel@iogearbox.net, ast@kernel.org,\n\ttj@kernel.org, davem@davemloft.net",
        "Cc": "David Ahern <dsahern@gmail.com>",
        "Subject": "[PATCH v2 net-next 5/8] samples/bpf: Add detach option to\n\ttest_cgrp2_sock",
        "Date": "Fri, 25 Aug 2017 12:05:38 -0700",
        "Message-Id": "<1503687941-626-6-git-send-email-dsahern@gmail.com>",
        "X-Mailer": "git-send-email 2.1.4",
        "In-Reply-To": "<1503687941-626-1-git-send-email-dsahern@gmail.com>",
        "References": "<1503687941-626-1-git-send-email-dsahern@gmail.com>",
        "Sender": "netdev-owner@vger.kernel.org",
        "Precedence": "bulk",
        "List-ID": "<netdev.vger.kernel.org>",
        "X-Mailing-List": "netdev@vger.kernel.org"
    },
    "content": "Add option to detach programs from a cgroup.\n\nSigned-off-by: David Ahern <dsahern@gmail.com>\n---\n samples/bpf/test_cgrp2_sock.c | 50 ++++++++++++++++++++++++++++++-------------\n 1 file changed, 35 insertions(+), 15 deletions(-)",
    "diff": "diff --git a/samples/bpf/test_cgrp2_sock.c b/samples/bpf/test_cgrp2_sock.c\nindex b018bf948933..a1ef7b8bd3f9 100644\n--- a/samples/bpf/test_cgrp2_sock.c\n+++ b/samples/bpf/test_cgrp2_sock.c\n@@ -114,7 +114,12 @@ static int prog_load(__u32 idx, __u32 mark, __u32 prio)\n \n static int usage(const char *argv0)\n {\n-\tprintf(\"Usage: %s -b bind-to-dev -m mark -p prio -r cg-path\\n\", argv0);\n+\tprintf(\"Usage:\\n\");\n+\tprintf(\"  Attach a program\\n\");\n+\tprintf(\"  %s -b bind-to-dev -m mark -p prio -r cg-path\\n\", argv0);\n+\tprintf(\"\\n\");\n+\tprintf(\"  Detach a program\\n\");\n+\tprintf(\"  %s -d cg-path\\n\", argv0);\n \treturn EXIT_FAILURE;\n }\n \n@@ -124,10 +129,14 @@ int main(int argc, char **argv)\n \t__u32 idx = 0, mark = 0, prio = 0;\n \tconst char *cgrp_path = NULL;\n \tint cg_fd, prog_fd, ret;\n+\tint do_attach = 1;\n \tint rc;\n \n-\twhile ((rc = getopt(argc, argv, \"b:m:p:r\")) != -1) {\n+\twhile ((rc = getopt(argc, argv, \"db:m:p:r\")) != -1) {\n \t\tswitch (rc) {\n+\t\tcase 'd':\n+\t\t\tdo_attach = 0;\n+\t\t\tbreak;\n \t\tcase 'b':\n \t\t\tidx = if_nametoindex(optarg);\n \t\t\tif (!idx) {\n@@ -161,7 +170,7 @@ int main(int argc, char **argv)\n \t\treturn EXIT_FAILURE;\n \t}\n \n-\tif (!idx && !mark && !prio) {\n+\tif (do_attach && !idx && !mark && !prio) {\n \t\tfprintf(stderr, \"One of device, mark or priority must be given\\n\");\n \t\treturn EXIT_FAILURE;\n \t}\n@@ -172,20 +181,31 @@ int main(int argc, char **argv)\n \t\treturn EXIT_FAILURE;\n \t}\n \n-\tprog_fd = prog_load(idx, mark, prio);\n-\tif (prog_fd < 0) {\n-\t\tprintf(\"Failed to load prog: '%s'\\n\", strerror(errno));\n-\t\tprintf(\"Output from kernel verifier:\\n%s\\n-------\\n\", bpf_log_buf);\n-\t\treturn EXIT_FAILURE;\n-\t}\n+\tif (do_attach) {\n+\t\tprog_fd = prog_load(idx, mark, prio);\n+\t\tif (prog_fd < 0) {\n+\t\t\tprintf(\"Failed to load prog: '%s'\\n\", strerror(errno));\n+\t\t\tprintf(\"Output from kernel verifier:\\n%s\\n-------\\n\",\n+\t\t\t       bpf_log_buf);\n+\t\t\treturn EXIT_FAILURE;\n+\t\t}\n \n-\tret = bpf_prog_attach(prog_fd, cg_fd, BPF_CGROUP_INET_SOCK_CREATE,\n-\t\t\t      attach_flags);\n-\tif (ret < 0) {\n-\t\tprintf(\"Failed to attach prog to cgroup: '%s'\\n\",\n-\t\t       strerror(errno));\n-\t\treturn EXIT_FAILURE;\n+\t\tret = bpf_prog_attach(prog_fd, cg_fd, BPF_CGROUP_INET_SOCK_CREATE,\n+\t\t\t\t      attach_flags);\n+\t\tif (ret < 0) {\n+\t\t\tprintf(\"Failed to attach prog to cgroup: '%s'\\n\",\n+\t\t\t       strerror(errno));\n+\t\t\treturn EXIT_FAILURE;\n+\t\t}\n+\t} else {\n+\t\tret = bpf_prog_detach(cg_fd, BPF_CGROUP_INET_SOCK_CREATE);\n+\t\tif (ret < 0) {\n+\t\t\tprintf(\"Failed to detach prog from cgroup: '%s'\\n\",\n+\t\t\t       strerror(errno));\n+\t\t\treturn EXIT_FAILURE;\n+\t\t}\n \t}\n \n+\tclose(cg_fd);\n \treturn EXIT_SUCCESS;\n }\n",
    "prefixes": [
        "v2",
        "net-next",
        "5/8"
    ]
}