283 lines
6.1 KiB
C
283 lines
6.1 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2018 Matthew Bobrowski. All Rights Reserved.
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*
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* Started by Matthew Bobrowski <mbobrowski@mbobrowski.org>
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*
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* DESCRIPTION
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* Validate that the newly introduced FAN_OPEN_EXEC mask functions as
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* expected. The idea is to generate a sequence of open related
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* actions to ensure that the correct event flags are being set
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* depending on what event mask was requested when the object was
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* marked.
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*/
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#define _GNU_SOURCE
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#include "config.h"
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#include <stdio.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include "tst_test.h"
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#include "fanotify.h"
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#if defined(HAVE_SYS_FANOTIFY_H)
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#include <sys/fanotify.h>
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#define EVENT_MAX 1024
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#define EVENT_SIZE (sizeof (struct fanotify_event_metadata))
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#define EVENT_BUF_LEN (EVENT_MAX * EVENT_SIZE)
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#define EVENT_SET_BUF 32
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#define BUF_SIZE 256
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#define TEST_APP "fanotify_child"
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static pid_t child_pid;
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static char fname[BUF_SIZE];
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static volatile int fd_notify;
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static volatile int complete;
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static char event_buf[EVENT_BUF_LEN];
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static struct test_case_t {
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const char *tname;
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struct fanotify_mark_type mark;
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unsigned long long mask;
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unsigned long long ignore_mask;
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int event_count;
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unsigned long long event_set[EVENT_SET_BUF];
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} test_cases[] = {
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{
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"inode mark, FAN_OPEN events",
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INIT_FANOTIFY_MARK_TYPE(INODE),
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FAN_OPEN,
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0,
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2,
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{FAN_OPEN, FAN_OPEN}
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},
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{
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"inode mark, FAN_OPEN_EXEC events",
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INIT_FANOTIFY_MARK_TYPE(INODE),
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FAN_OPEN_EXEC,
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0,
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1,
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{FAN_OPEN_EXEC}
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},
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{
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"inode mark, FAN_OPEN | FAN_OPEN_EXEC events",
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INIT_FANOTIFY_MARK_TYPE(INODE),
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FAN_OPEN | FAN_OPEN_EXEC,
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0,
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2,
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{FAN_OPEN, FAN_OPEN | FAN_OPEN_EXEC}
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},
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{
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"inode mark, FAN_OPEN events, ignore FAN_OPEN_EXEC",
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INIT_FANOTIFY_MARK_TYPE(INODE),
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FAN_OPEN,
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FAN_OPEN_EXEC,
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2,
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{FAN_OPEN, FAN_OPEN}
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},
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{
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"inode mark, FAN_OPEN_EXEC events, ignore FAN_OPEN",
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INIT_FANOTIFY_MARK_TYPE(INODE),
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FAN_OPEN_EXEC,
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FAN_OPEN,
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1,
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{FAN_OPEN_EXEC}
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},
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{
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"inode mark, FAN_OPEN | FAN_OPEN_EXEC events, ignore "
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"FAN_OPEN_EXEC",
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INIT_FANOTIFY_MARK_TYPE(INODE),
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FAN_OPEN | FAN_OPEN_EXEC,
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FAN_OPEN_EXEC,
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2,
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{FAN_OPEN, FAN_OPEN}
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}
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};
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static int generate_events(void)
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{
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int fd, status;
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child_pid = SAFE_FORK();
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/*
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* Generate a sequence of events
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*/
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if (child_pid == 0) {
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SAFE_CLOSE(fd_notify);
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fd = SAFE_OPEN(fname, O_RDONLY);
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if (fd > 0)
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SAFE_CLOSE(fd);
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SAFE_EXECL(TEST_APP, TEST_APP, NULL);
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exit(1);
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}
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SAFE_WAITPID(child_pid, &status, 0);
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if (WIFEXITED(status) && WEXITSTATUS(status) == 0)
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return 1;
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return 0;
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}
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static int setup_mark(unsigned int n)
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{
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unsigned int i = 0;
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struct test_case_t *tc = &test_cases[n];
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struct fanotify_mark_type *mark = &tc->mark;
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const char *const files[] = {fname, TEST_APP};
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tst_res(TINFO, "Test #%d: %s", n, tc->tname);
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fd_notify = SAFE_FANOTIFY_INIT(FAN_CLASS_NOTIF, O_RDONLY);
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for (; i < ARRAY_SIZE(files); i++) {
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/* Setup normal mark on object */
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if (fanotify_mark(fd_notify, FAN_MARK_ADD | mark->flag,
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tc->mask, AT_FDCWD, files[i]) < 0) {
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if (errno == EINVAL && tc->mask & FAN_OPEN_EXEC) {
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tst_res(TCONF,
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"FAN_OPEN_EXEC not supported in "
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"kernel?");
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return -1;
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} else if (errno == EINVAL) {
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tst_brk(TCONF | TERRNO,
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"CONFIG_FANOTIFY_ACCESS_PERMISSIONS "
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"not configured in kernel?");
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}else {
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tst_brk(TBROK | TERRNO,
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"fanotify_mark(%d, FAN_MARK_ADD | %s, "
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"%llx, AT_FDCWD, %s) failed",
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fd_notify,
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mark->name,
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tc->mask,
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files[i]);
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}
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}
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/* Setup ignore mark on object */
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if (tc->ignore_mask) {
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if (fanotify_mark(fd_notify, FAN_MARK_ADD | mark->flag
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| FAN_MARK_IGNORED_MASK,
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tc->ignore_mask, AT_FDCWD,
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files[i]) < 0) {
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if (errno == EINVAL &&
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tc->ignore_mask & FAN_OPEN_EXEC) {
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tst_res(TCONF,
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"FAN_OPEN_EXEC not supported "
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"in kernel?");
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return -1;
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} else if (errno == EINVAL) {
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tst_brk(TCONF | TERRNO,
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"CONFIG_FANOTIFY_ACCESS_"
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"PERMISSIONS not configured in "
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"kernel?");
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} else {
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tst_brk(TBROK | TERRNO,
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"fanotify_mark (%d, "
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"FAN_MARK_ADD | %s "
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"| FAN_MARK_IGNORED_MASK, "
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"%llx, AT_FDCWD, %s) failed",
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fd_notify, mark->name,
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tc->ignore_mask, files[i]);
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}
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}
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}
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}
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return 0;
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}
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static void do_test(unsigned int n)
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{
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int len = 0, event_num = 0;
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struct test_case_t *tc = &test_cases[n];
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struct fanotify_event_metadata *event;
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/* Place a mark on the object */
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if (setup_mark(n) != 0)
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goto cleanup;
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/* Generate events in child process */
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if (!generate_events())
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goto cleanup;
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/* Read available events into buffer */
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len = SAFE_READ(0, fd_notify, event_buf, EVENT_BUF_LEN);
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event = (struct fanotify_event_metadata *) event_buf;
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/* Process events */
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while (FAN_EVENT_OK(event, len) && event_num < tc->event_count) {
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if (event->mask != *(tc->event_set + event_num)) {
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tst_res(TFAIL,
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"Received event: mask=%llx (expected %llx, "
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"pid=%u, fd=%d",
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(unsigned long long) event->mask,
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*(tc->event_set + event_num),
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(unsigned) event->pid,
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event->fd);
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} else if (event->pid != child_pid) {
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tst_res(TFAIL,
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"Received event: mask=%llx, pid=%u (expected "
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"%u), fd=%d",
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(unsigned long long) event->mask,
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(unsigned) event->pid,
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(unsigned) child_pid,
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event->fd);
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} else {
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tst_res(TPASS,
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"Received event: mask=%llx, pid=%u, fd=%d",
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(unsigned long long) event->mask,
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(unsigned) event->pid,
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event->fd);
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}
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if (event->fd != FAN_NOFD)
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SAFE_CLOSE(event->fd);
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event_num++;
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event = FAN_EVENT_NEXT(event, len);
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}
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cleanup:
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if (fd_notify > 0)
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SAFE_CLOSE(fd_notify);
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}
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static void do_setup(void)
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{
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sprintf(fname, "fname_%d", getpid());
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SAFE_FILE_PRINTF(fname, "1");
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}
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static void do_cleanup(void)
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{
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if (fd_notify > 0)
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SAFE_CLOSE(fd_notify);
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}
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static const char *const resource_files[] = {
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TEST_APP,
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NULL
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};
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static struct tst_test test = {
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.setup = do_setup,
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.test = do_test,
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.tcnt = ARRAY_SIZE(test_cases),
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.cleanup = do_cleanup,
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.forks_child = 1,
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.needs_root = 1,
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.resource_files = resource_files
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};
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#else
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TST_TEST_TCONF("System does not contain required fanotify support");
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#endif
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