From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7FF84C6FD19 for ; Fri, 10 Mar 2023 22:16:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231674AbjCJWQW (ORCPT ); Fri, 10 Mar 2023 17:16:22 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46366 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231495AbjCJWQQ (ORCPT ); Fri, 10 Mar 2023 17:16:16 -0500 Received: from mx0b-00069f02.pphosted.com (mx0b-00069f02.pphosted.com [205.220.177.32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BA4B513F54B; Fri, 10 Mar 2023 14:16:14 -0800 (PST) Received: from pps.filterd (m0246632.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 32ALhxT1026800; Fri, 10 Mar 2023 22:15:58 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=corp-2022-7-12; bh=qNitOfdyftQUtr/OK4KHEeLFBABIkHQ2N6q3MIkFuhs=; b=F7gUrThlexIh/9AAwj4bMKQZ3L+1mQkaQVUqKoqTOtNTd0K8O764s0Obu8+cCCOuWE4i iX78MMFH9+qBYYtIeKdGVhf8ytDZYzHqogXFqSEMEEpAxZ5QnJ8gsKO+EC66NTslGObg hvjfLxZsOl0Q97PTzVtBUcRlgNnMik6eVNrIymfQvS4yhctkAju96dvSOWQI6AgXCNY/ mH7HrvakLfD1VpO1jS8aBabX8rC4rI3Ra48LV8SiRDG3oMa8qbU8Z+C66XdGrm5PtwVb Jej3FoKjZZR3cnPtYaKEQDTsvym0kVAWL2bL9NzIJ3Z7P8H61/uAeXUt1M99ZXtbF0pr jw== Received: from phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta01.appoci.oracle.com [138.1.114.2]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 3p417cp9hw-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 10 Mar 2023 22:15:58 +0000 Received: from pps.filterd (phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com (8.17.1.5/8.17.1.5) with ESMTP id 32AM3Xxu031713; Fri, 10 Mar 2023 22:15:57 GMT Received: from pps.reinject (localhost [127.0.0.1]) by phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTPS id 3p6feqs9t9-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 10 Mar 2023 22:15:57 +0000 Received: from phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 32AMFrP1028711; Fri, 10 Mar 2023 22:15:56 GMT Received: from ca-dev112.us.oracle.com (ca-dev112.us.oracle.com [10.129.136.47]) by phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTP id 3p6feqs9nh-4; Fri, 10 Mar 2023 22:15:56 +0000 From: Anjali Kulkarni To: davem@davemloft.net Cc: edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, zbr@ioremap.net, brauner@kernel.org, johannes@sipsolutions.net, ecree.xilinx@gmail.com, leon@kernel.org, keescook@chromium.org, socketcan@hartkopp.net, petrm@nvidia.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, anjali.k.kulkarni@oracle.com Subject: [PATCH v1 3/5] connector/cn_proc: Test code for proc connector Date: Fri, 10 Mar 2023 14:15:45 -0800 Message-Id: <20230310221547.3656194-4-anjali.k.kulkarni@oracle.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230310221547.3656194-1-anjali.k.kulkarni@oracle.com> References: <20230310221547.3656194-1-anjali.k.kulkarni@oracle.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-03-10_10,2023-03-10_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 phishscore=0 spamscore=0 bulkscore=0 mlxlogscore=999 suspectscore=0 malwarescore=0 mlxscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2303100177 X-Proofpoint-GUID: 0T6jrbKdKirA9gnVy04BivXvtHhUm9BP X-Proofpoint-ORIG-GUID: 0T6jrbKdKirA9gnVy04BivXvtHhUm9BP Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Test code for proc connector. Signed-off-by: Anjali Kulkarni --- samples/connector/proc_filter.c | 262 ++++++++++++++++++++++++++++++++ 1 file changed, 262 insertions(+) create mode 100644 samples/connector/proc_filter.c diff --git a/samples/connector/proc_filter.c b/samples/connector/proc_filter.c new file mode 100644 index 000000000000..25202f5bc126 --- /dev/null +++ b/samples/connector/proc_filter.c @@ -0,0 +1,262 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include + +#define NL_MESSAGE_SIZE (sizeof(struct nlmsghdr) + sizeof(struct cn_msg) + \ + sizeof(int)) + +#define MAX_EVENTS 1 + +#ifdef ENABLE_PRINTS +#define Printf printf +#else +#define Printf +#endif + +volatile static int interrupted; +static int nl_sock, ret_errno, tcount; +static struct epoll_event evn; + +int send_message(enum proc_cn_mcast_op mcast_op) +{ + char buff[NL_MESSAGE_SIZE]; + struct nlmsghdr *hdr; + struct cn_msg *msg; + + hdr = (struct nlmsghdr *)buff; + hdr->nlmsg_len = NL_MESSAGE_SIZE; + hdr->nlmsg_type = NLMSG_DONE; + hdr->nlmsg_flags = 0; + hdr->nlmsg_seq = 0; + hdr->nlmsg_pid = getpid(); + + msg = (struct cn_msg *)NLMSG_DATA(hdr); + msg->id.idx = CN_IDX_PROC; + msg->id.val = CN_VAL_PROC; + msg->seq = 0; + msg->ack = 0; + msg->flags = 0; + + msg->len = sizeof(int); + *(int *)msg->data = mcast_op; + + if (send(nl_sock, hdr, hdr->nlmsg_len, 0) == -1) { + ret_errno = errno; + perror("send failed"); + return -3; + } + return 0; +} + +int register_proc_netlink(int *efd, enum proc_cn_mcast_op mcast_op) +{ + struct sockaddr_nl sa_nl; + int err = 0, epoll_fd; + + nl_sock = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_CONNECTOR); + + if (nl_sock == -1) { + ret_errno = errno; + perror("socket failed"); + return -1; + } + + bzero(&sa_nl, sizeof(sa_nl)); + sa_nl.nl_family = AF_NETLINK; + sa_nl.nl_groups = CN_IDX_PROC; + sa_nl.nl_pid = getpid(); + + if (bind(nl_sock, (struct sockaddr *)&sa_nl, sizeof(sa_nl)) == -1) { + ret_errno = errno; + perror("bind failed"); + return -2; + } + + epoll_fd = epoll_create1(EPOLL_CLOEXEC); + if (epoll_fd < 0) { + ret_errno = errno; + perror("epoll_create1 failed"); + return -2; + } + + err = send_message(mcast_op); + if (err < 0) + return err; + + evn.events = EPOLLIN; + evn.data.fd = nl_sock; + if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, nl_sock, &evn) < 0) { + ret_errno = errno; + perror("epoll_ctl failed"); + return -3; + } + *efd = epoll_fd; + return 0; +} + +static void sigint(__attribute__((__always_unused)) int sig) +{ + interrupted = 1; +} + +int handle_packet(char *buff, int fd, struct proc_event *event) +{ + struct nlmsghdr *hdr; + + hdr = (struct nlmsghdr *)buff; + + if (hdr->nlmsg_type == NLMSG_ERROR) { + perror("NLMSG_ERROR error\n"); + return -3; + } else if (hdr->nlmsg_type == NLMSG_DONE) { + event = (struct proc_event *) + ((struct cn_msg *)NLMSG_DATA(hdr))->data; + tcount++; + switch (event->what) { + case PROC_EVENT_EXIT: + Printf("Exit process %d (tgid %d) with code %d, signal %d\n", + event->event_data.exit.process_pid, + event->event_data.exit.process_tgid, + event->event_data.exit.exit_code, + event->event_data.exit.exit_signal); + break; + case PROC_EVENT_FORK: + Printf("Fork process %d (tgid %d), parent %d (tgid %d)\n", + event->event_data.fork.child_pid, + event->event_data.fork.child_tgid, + event->event_data.fork.parent_pid, + event->event_data.fork.parent_tgid); + break; + case PROC_EVENT_EXEC: + Printf("Exec process %d (tgid %d)\n", + event->event_data.exec.process_pid, + event->event_data.exec.process_tgid); + break; + case PROC_EVENT_UID: + Printf("UID process %d (tgid %d) uid %d euid %d\n", + event->event_data.id.process_pid, + event->event_data.id.process_tgid, + event->event_data.id.r.ruid, + event->event_data.id.e.euid); + break; + case PROC_EVENT_GID: + Printf("GID process %d (tgid %d) gid %d egid %d\n", + event->event_data.id.process_pid, + event->event_data.id.process_tgid, + event->event_data.id.r.rgid, + event->event_data.id.e.egid); + break; + case PROC_EVENT_SID: + Printf("SID process %d (tgid %d)\n", + event->event_data.sid.process_pid, + event->event_data.sid.process_tgid); + break; + case PROC_EVENT_PTRACE: + Printf("Ptrace process %d (tgid %d), Tracer %d (tgid %d)\n", + event->event_data.ptrace.process_pid, + event->event_data.ptrace.process_tgid, + event->event_data.ptrace.tracer_pid, + event->event_data.ptrace.tracer_tgid); + break; + case PROC_EVENT_COMM: + Printf("Comm process %d (tgid %d) comm %s\n", + event->event_data.comm.process_pid, + event->event_data.comm.process_tgid, + event->event_data.comm.comm); + break; + case PROC_EVENT_COREDUMP: + Printf("Coredump process %d (tgid %d) parent %d, (tgid %d)\n", + event->event_data.coredump.process_pid, + event->event_data.coredump.process_tgid, + event->event_data.coredump.parent_pid, + event->event_data.coredump.parent_tgid); + break; + default: + break; + } + } + return 0; +} + +int handle_events(int epoll_fd, struct proc_event *pev) +{ + char buff[CONNECTOR_MAX_MSG_SIZE]; + struct epoll_event ev[MAX_EVENTS]; + int i, event_count = 0, err = 0; + + event_count = epoll_wait(epoll_fd, ev, MAX_EVENTS, -1); + if (event_count < 0) { + ret_errno = errno; + if (ret_errno != EINTR) + perror("epoll_wait failed"); + return -3; + } + for (i = 0; i < event_count; i++) { + if (!(ev[i].events & EPOLLIN)) + continue; + if (recv(ev[i].data.fd, buff, sizeof(buff), 0) == -1) { + ret_errno = errno; + perror("recv failed"); + return -3; + } + err = handle_packet(buff, ev[i].data.fd, pev); + if (err < 0) + return err; + } + return 0; +} + +int main(int argc, char *argv[]) +{ + int epoll_fd, err; + struct proc_event proc_ev; + + signal(SIGINT, sigint); + + err = register_proc_netlink(&epoll_fd, PROC_CN_MCAST_LISTEN); + if (err < 0) { + if (err == -2) + close(nl_sock); + if (err == -3) { + close(nl_sock); + close(epoll_fd); + } + exit(1); + } + + while (!interrupted) { + err = handle_events(epoll_fd, &proc_ev); + if (err < 0) { + if (ret_errno == EINTR) + continue; + if (err == -2) + close(nl_sock); + if (err == -3) { + close(nl_sock); + close(epoll_fd); + } + exit(1); + } + } + + send_message(PROC_CN_MCAST_IGNORE); + + close(epoll_fd); + close(nl_sock); + + printf("Done total count: %d\n", tcount); + exit(0); +} -- 2.31.1