granicus.if.org Git - strace/blob - tests/fanotify_mark.c

   1 /*
   2  * Check decoding of fanotify_mark syscall.
   3  *
   4  * Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
   5  * Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. The name of the author may not be used to endorse or promote products
  17  *    derived from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #include "tests.h"
  32
  33 #include <asm/unistd.h>
  34
  35 #if defined HAVE_SYS_FANOTIFY_H && defined HAVE_FANOTIFY_MARK && \
  36         defined __NR_fanotify_mark
  37
  38 # include <limits.h>
  39 # include <stdio.h>
  40 # include <unistd.h>
  41
  42 # include <sys/fanotify.h>
  43
  44 # include "kernel_types.h"
  45
  46 /* Performs fanotify_mark call via the syscall interface. */
  47 static void
  48 do_call(kernel_ulong_t fd, kernel_ulong_t flags, const char *flags_str,
  49         uint64_t mask, const char *mask_str, kernel_ulong_t dirfd,
  50         const char *dirfd_str, kernel_ulong_t path, const char *path_str)
  51 {
  52         long rc;
  53
  54         rc = syscall(__NR_fanotify_mark, fd, flags,
  55 # if (LONG_MAX > INT_MAX) \
  56   || (defined __x86_64__ && defined __ILP32__) \
  57   || defined LINUX_MIPSN32
  58                 mask,
  59 # else
  60 /* arch/parisc/kernel/sys_parisc32.c, commit ab8a261b */
  61 #  ifdef HPPA
  62                 LL_VAL_TO_PAIR((mask << 32) | (mask >> 32)),
  63 #  else
  64                 LL_VAL_TO_PAIR(mask),
  65 #  endif
  66 # endif
  67                 dirfd, path);
  68
  69         printf("fanotify_mark(%d, %s, %s, %s, %s) = %s\n",
  70                (int) fd, flags_str, mask_str, dirfd_str, path_str,
  71                sprintrc(rc));
  72 }
  73
  74 struct strval {
  75         kernel_ulong_t val;
  76         const char *str;
  77 };
  78
  79 struct strval64 {
  80         uint64_t val;
  81         const char *str;
  82 };
  83
  84 #define STR16 "0123456789abcdef"
  85 #define STR64 STR16 STR16 STR16 STR16
  86
  87 int
  88 main(void)
  89 {
  90         enum {
  91                 PATH1_SIZE = 64,
  92         };
  93
  94         static const kernel_ulong_t fds[] = {
  95                 (kernel_ulong_t) 0xdeadfeed12345678ULL,
  96                 (kernel_ulong_t) 0xffffffff00000000ULL,
  97                 (kernel_ulong_t) 0xdeb0d1edffffffffULL,
  98         };
  99         static const struct strval flags[] = {
 100                 { (kernel_ulong_t) 0xffffffff00000000ULL, "0" },
 101                 { (kernel_ulong_t) 0xdec0deddefaced00ULL,
 102                         "0xefaced00 /* FAN_MARK_??? */" },
 103                 { (kernel_ulong_t) 0xda7a105700000040ULL,
 104                         "FAN_MARK_IGNORED_SURV_MODIFY" },
 105                 { (kernel_ulong_t) 0xbadc0deddeadfeedULL,
 106                         "FAN_MARK_ADD|FAN_MARK_DONT_FOLLOW|FAN_MARK_ONLYDIR|"
 107                         "FAN_MARK_IGNORED_MASK|FAN_MARK_IGNORED_SURV_MODIFY|"
 108                         "FAN_MARK_FLUSH|0xdeadfe00" },
 109         };
 110         static const struct strval64 masks[] = {
 111                 { ARG_ULL_STR(0) },
 112                 { 0xdeadfeedfacebeefULL,
 113                         "FAN_ACCESS|FAN_MODIFY|FAN_CLOSE_WRITE|FAN_OPEN|"
 114                         "FAN_ACCESS_PERM|FAN_ONDIR|FAN_EVENT_ON_CHILD|"
 115                         "0xdeadfeedb2ccbec4" },
 116                 { ARG_ULL_STR(0xffffffffb7fcbfc4) " /* FAN_??? */" },
 117         };
 118         static const struct strval dirfds[] = {
 119                 { (kernel_ulong_t) 0xfacefeed00000001ULL, "1" },
 120                 { (kernel_ulong_t) 0xdec0ded0ffffffffULL, "FAN_NOFD" },
 121                 { (kernel_ulong_t) 0xbadfacedffffff9cULL, "AT_FDCWD" },
 122                 { (kernel_ulong_t) 0xdefaced1beeff00dULL, "-1091571699" },
 123         };
 124         static const char str64[] = STR64;
 125
 126         static char bogus_path1_addr[sizeof("0x") + sizeof(void *) * 2];
 127         static char bogus_path1_after_addr[sizeof("0x") + sizeof(void *) * 2];
 128
 129         char *bogus_path1 = tail_memdup(str64, PATH1_SIZE);
 130         char *bogus_path2 = tail_memdup(str64, sizeof(str64));
 131
 132         struct strval paths[] = {
 133                 { (kernel_ulong_t) 0, "NULL" },
 134                 { (kernel_ulong_t) (uintptr_t) (bogus_path1 + PATH1_SIZE),
 135                         bogus_path1_after_addr },
 136                 { (kernel_ulong_t) (uintptr_t) bogus_path1, bogus_path1_addr },
 137                 { (kernel_ulong_t) (uintptr_t) bogus_path2, "\"" STR64 "\"" },
 138         };
 139
 140         unsigned int i;
 141         unsigned int j;
 142         unsigned int k;
 143         unsigned int l;
 144         unsigned int m;
 145         int rc;
 146
 147
 148         snprintf(bogus_path1_addr, sizeof(bogus_path1_addr), "%p", bogus_path1);
 149         snprintf(bogus_path1_after_addr, sizeof(bogus_path1_after_addr), "%p",
 150                 bogus_path1 + PATH1_SIZE);
 151
 152         rc = fanotify_mark(-1, FAN_MARK_ADD, FAN_MODIFY | FAN_ONDIR,
 153                                -100, ".");
 154         printf("fanotify_mark(-1, FAN_MARK_ADD, FAN_MODIFY|FAN_ONDIR"
 155                ", AT_FDCWD, \".\") = %s\n", sprintrc(rc));
 156
 157         for (i = 0; i < ARRAY_SIZE(fds); i++) {
 158                 for (j = 0; j < ARRAY_SIZE(flags); j++) {
 159                         for (k = 0; k < ARRAY_SIZE(masks); k++) {
 160                                 for (l = 0; l < ARRAY_SIZE(dirfds); l++) {
 161                                         for (m = 0; m < ARRAY_SIZE(paths); m++)
 162                                                 do_call(fds[i],
 163                                                         flags[j].val,
 164                                                         flags[j].str,
 165                                                         masks[k].val,
 166                                                         masks[k].str,
 167                                                         dirfds[l].val,
 168                                                         dirfds[l].str,
 169                                                         paths[m].val,
 170                                                         paths[m].str);
 171                                 }
 172                         }
 173                 }
 174         }
 175
 176         puts("+++ exited with 0 +++");
 177         return 0;
 178 }
 179
 180 #else
 181
 182 SKIP_MAIN_UNDEFINED("HAVE_SYS_FANOTIFY_H && HAVE_FANOTIFY_MARK && "
 183                     "__NR_fanotify_mark")
 184
 185 #endif