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/*
* 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) 2015-2023 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) 0xbadc0deddeadffffULL,
# if XLAT_RAW || XLAT_VERBOSE
"0xdeadffff"
# endif
# if XLAT_VERBOSE
" /* "
# endif
# if !XLAT_RAW
"FAN_MARK_ADD|FAN_MARK_REMOVE|FAN_MARK_DONT_FOLLOW|"
"FAN_MARK_ONLYDIR|FAN_MARK_MOUNT|FAN_MARK_IGNORED_MASK|"
"FAN_MARK_IGNORED_SURV_MODIFY|FAN_MARK_FLUSH|"
"FAN_MARK_FILESYSTEM|FAN_MARK_EVICTABLE|"
"FAN_MARK_IGNORE|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_ONDIR|"
"FAN_EVENT_ON_CHILD|"
"FAN_RENAME|"
"0xdeadfeeda7f02000"
# endif
# if XLAT_VERBOSE
" */"
# endif
},
{ ARG_ULL_STR(0xffffffffa7f02000)
# 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
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