tests/fanotify_mark.c - master - githubmirror/strace

tests/fanotify_mark.c
283 строки7 KB
Dmitry V. Levin
xlat: update FAN_* constants
01 май 2025, 11:00
01 май 2025, 11:0085c3821
/*
 * Check decoding of fanotify_mark syscall.
 *
 * Copyright (c) 2015-2016 Dmitry V. Levin <ldv@strace.io>
 * Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
 * Copyright (c) 2015-2025 The strace developers.
 * All rights reserved.
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */

#include "tests.h"
#include "scno.h"

#if defined HAVE_SYS_FANOTIFY_H && defined HAVE_FANOTIFY_MARK

# include <limits.h>
# include <stdint.h>
# include <stdio.h>
# include <unistd.h>
# include <sys/fanotify.h>

# include "secontext.h"

# if XLAT_RAW
#  define str_fan_mark_add	"0x1"
#  define str_fan_modify_ondir	"0x40000002"
#  define str_at_fdcwd		"-100"
# elif XLAT_VERBOSE
#  define str_fan_mark_add	"0x1 /* FAN_MARK_ADD */"
#  define str_fan_modify_ondir	"0x40000002 /* FAN_MODIFY|FAN_ONDIR */"
#  define str_at_fdcwd		"-100 /* AT_FDCWD */"
# else
#  define str_fan_mark_add	"FAN_MARK_ADD"
#  define str_fan_modify_ondir	"FAN_MODIFY|FAN_ONDIR"
#  define str_at_fdcwd		"AT_FDCWD"
# endif

# ifndef TEST_SECONTEXT
/* Performs fanotify_mark call via the syscall interface. */
static void
do_call(kernel_ulong_t fd, kernel_ulong_t flags, const char *flags_str,
	uint64_t mask, const char *mask_str, kernel_ulong_t dirfd,
	const char *dirfd_str, kernel_ulong_t path, const char *path_str)
{
	long rc;

	rc = syscall(__NR_fanotify_mark, fd, flags,
#  if (LONG_MAX > INT_MAX) \
   || (defined __x86_64__ && defined __ILP32__) \
   || defined LINUX_MIPSN32
		mask,
#  else
		LL_VAL_TO_PAIR(mask),
#  endif
		dirfd, path);

	printf("fanotify_mark(%d, %s, %s, %s, %s) = %s\n",
	       (int) fd, flags_str, mask_str, dirfd_str, path_str,
	       sprintrc(rc));
}

struct strval {
	kernel_ulong_t val;
	const char *str;
};

#  define STR16 "0123456789abcdef"
#  define STR64 STR16 STR16 STR16 STR16
# endif /* !TEST_SECONTEXT */

int
main(void)
{
# ifndef TEST_SECONTEXT
	enum {
		PATH1_SIZE = 64,
	};

	static const kernel_ulong_t fds[] = {
		(kernel_ulong_t) 0xdeadfeed12345678ULL,
		F8ILL_KULONG_MASK,
		(kernel_ulong_t) 0xdeb0d1edffffffffULL,
	};
	static const struct strval flags[] = {
		{ F8ILL_KULONG_MASK, "0" },
		{ (kernel_ulong_t) 0xdec0deddeface800ULL,
			"0xeface800"
#  if !XLAT_RAW
			" /* FAN_MARK_??? */"
#  endif
			},
		{ (kernel_ulong_t) 0xda7a105700000040ULL,
#  if XLAT_RAW
			"0x40"
#  elif XLAT_VERBOSE
			"0x40 /* FAN_MARK_IGNORED_SURV_MODIFY */"
#  else
			"FAN_MARK_IGNORED_SURV_MODIFY"
#  endif
			},
		{ (kernel_ulong_t) 0xffffffff00000013ULL,
#  if XLAT_RAW
			"0x13"
#  elif XLAT_VERBOSE
			"0x13 /* FAN_MARK_ADD|FAN_MARK_REMOVE|FAN_MARK_MOUNT */"
#  else
			"FAN_MARK_ADD|FAN_MARK_REMOVE|FAN_MARK_MOUNT"
#  endif
			},
		{ (kernel_ulong_t) 0xffffffff00000182ULL,
#  if XLAT_RAW
			"0x182"
#  elif XLAT_VERBOSE
			"0x182 /* FAN_MARK_REMOVE|FAN_MARK_FLUSH|FAN_MARK_FILESYSTEM */"
#  else
			"FAN_MARK_REMOVE|FAN_MARK_FLUSH|FAN_MARK_FILESYSTEM"
#  endif
			},
		{ (kernel_ulong_t) 0xbadc0deddeadffffULL,
#  if XLAT_RAW || XLAT_VERBOSE
			"0xdeadffff"
#  endif
#  if XLAT_VERBOSE
			" /* "
#  endif
#  if !XLAT_RAW
			"FAN_MARK_ADD|FAN_MARK_REMOVE|FAN_MARK_FLUSH|"
			"FAN_MARK_DONT_FOLLOW|FAN_MARK_ONLYDIR|FAN_MARK_MNTNS|"
			"FAN_MARK_IGNORED_MASK|FAN_MARK_IGNORED_SURV_MODIFY|"
			"FAN_MARK_IGNORE|FAN_MARK_EVICTABLE|0xdeadf800"
#  endif
#  if XLAT_VERBOSE
			" */"
#  endif
			},
	};
	static const struct strval64 masks[] = {
		{ ARG_ULL_STR(0) },
		{ 0xdeadfeedffffffffULL,
#  if XLAT_RAW || XLAT_VERBOSE
			"0xdeadfeedffffffff"
#  endif
#  if XLAT_VERBOSE
			" /* "
#  endif
#  if !XLAT_RAW
			"FAN_ACCESS|"
			"FAN_MODIFY|"
			"FAN_ATTRIB|"
			"FAN_CLOSE_WRITE|"
			"FAN_CLOSE_NOWRITE|"
			"FAN_OPEN|"
			"FAN_MOVED_FROM|"
			"FAN_MOVED_TO|"
			"FAN_CREATE|"
			"FAN_DELETE|"
			"FAN_DELETE_SELF|"
			"FAN_MOVE_SELF|"
			"FAN_OPEN_EXEC|"
			"FAN_Q_OVERFLOW|"
			"FAN_FS_ERROR|"
			"FAN_OPEN_PERM|"
			"FAN_ACCESS_PERM|"
			"FAN_OPEN_EXEC_PERM|"
			"FAN_DIR_MODIFY|"
			"FAN_PRE_ACCESS|"
			"FAN_MNT_ATTACH|"
			"FAN_MNT_DETACH|"
			"FAN_EVENT_ON_CHILD|"
			"FAN_RENAME|"
			"FAN_ONDIR|"
			"0xdeadfeeda4e02000"
#  endif
#  if XLAT_VERBOSE
			" */"
#  endif
			},
		{ ARG_ULL_STR(0xffffffffa4e02000)
#  if !XLAT_RAW
			" /* FAN_??? */"
#  endif
			},
	};
	static const struct strval dirfds[] = {
		{ (kernel_ulong_t) 0xfacefeed00000001ULL, "1" },
		{ (kernel_ulong_t) 0xdec0ded0ffffffffULL,
#  if XLAT_RAW
			"-1"
#  elif XLAT_VERBOSE
			"-1 /* FAN_NOFD */"
#  else
			"FAN_NOFD"
#  endif
			},
		{ (kernel_ulong_t) 0xbadfacedffffff9cULL, str_at_fdcwd },
		{ (kernel_ulong_t) 0xdefaced1beeff00dULL, "-1091571699" },
	};
	static const char str64[] = STR64;

	static char bogus_path1_addr[sizeof("0x") + sizeof(void *) * 2];
	static char bogus_path1_after_addr[sizeof("0x") + sizeof(void *) * 2];

	char *bogus_path1 = tail_memdup(str64, PATH1_SIZE);
	char *bogus_path2 = tail_memdup(str64, sizeof(str64));

	struct strval paths[] = {
		{ (kernel_ulong_t) 0, "NULL" },
		{ (kernel_ulong_t) (uintptr_t) (bogus_path1 + PATH1_SIZE),
			bogus_path1_after_addr },
		{ (kernel_ulong_t) (uintptr_t) bogus_path1, bogus_path1_addr },
		{ (kernel_ulong_t) (uintptr_t) bogus_path2, "\"" STR64 "\"" },
	};

	snprintf(bogus_path1_addr, sizeof(bogus_path1_addr), "%p", bogus_path1);
	snprintf(bogus_path1_after_addr, sizeof(bogus_path1_after_addr), "%p",
		bogus_path1 + PATH1_SIZE);

	for (unsigned int i = 0;
	     i < ARRAY_SIZE(fds); ++i) {
		for (unsigned int j = 0;
		     j < ARRAY_SIZE(flags); ++j) {
			for (unsigned int k = 0;
			     k < ARRAY_SIZE(masks); ++k) {
				for (unsigned int l = 0;
				     l < ARRAY_SIZE(dirfds); ++l) {
					for (unsigned int m = 0;
					     m < ARRAY_SIZE(paths); ++m)
						do_call(fds[i],
							flags[j].val,
							flags[j].str,
							masks[k].val,
							masks[k].str,
							dirfds[l].val,
							dirfds[l].str,
							paths[m].val,
							paths[m].str);
				}
			}
		}
	}
# endif
	/*
	 * Test with AT_FDCWD.
	 */

	char *my_secontext = SECONTEXT_PID_MY();
	char path[] = ".";
	char *path_secontext = SECONTEXT_FILE(path);

	int rc = fanotify_mark(-1, FAN_MARK_ADD, FAN_MODIFY | FAN_ONDIR,
			   -100, path);
	printf("%s%s(-1, %s, %s, %s, \"%s\"%s) = %s\n",
	       my_secontext, "fanotify_mark",
	       str_fan_mark_add, str_fan_modify_ondir, str_at_fdcwd,
	       path, path_secontext,
	       sprintrc(rc));

	/*
	 * Test with dirfd.
	 */

	int cwd_fd = get_dir_fd(".");
	char *cwd_secontext = SECONTEXT_FILE(".");

	rc = fanotify_mark(-1, FAN_MARK_ADD, FAN_MODIFY | FAN_ONDIR,
			   cwd_fd, path);
	printf("%s%s(-1, %s, %s, %d%s, \"%s\"%s) = %s\n",
	       my_secontext, "fanotify_mark",
	       str_fan_mark_add, str_fan_modify_ondir,
	       cwd_fd, cwd_secontext,
	       path, path_secontext,
	       sprintrc(rc));

	puts("+++ exited with 0 +++");
	return 0;
}

#else

SKIP_MAIN_UNDEFINED("HAVE_SYS_FANOTIFY_H && HAVE_FANOTIFY_MARK")

#endif