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 # include <sys/fanotify.h>
  42
  43 /* Performs fanotify_mark call via the syscall interface. */
  44 static void
  45 do_call(kernel_ulong_t fd, kernel_ulong_t flags, const char *flags_str,
  46         uint64_t mask, const char *mask_str, kernel_ulong_t dirfd,
  47         const char *dirfd_str, kernel_ulong_t path, const char *path_str)
  48 {
  49         long rc;
  50
  51         rc = syscall(__NR_fanotify_mark, fd, flags,
  52 # if (LONG_MAX > INT_MAX) \
  53   || (defined __x86_64__ && defined __ILP32__) \
  54   || defined LINUX_MIPSN32
  55                 mask,
  56 # else
  57 /* arch/parisc/kernel/sys_parisc32.c, commit ab8a261b */
  58 #  ifdef HPPA
  59                 LL_VAL_TO_PAIR((mask << 32) | (mask >> 32)),
  60 #  else
  61                 LL_VAL_TO_PAIR(mask),
  62 #  endif
  63 # endif
  64                 dirfd, path);
  65
  66         printf("fanotify_mark(%d, %s, %s, %s, %s) = %s\n",
  67                (int) fd, flags_str, mask_str, dirfd_str, path_str,
  68                sprintrc(rc));
  69 }
  70
  71 struct strval {
  72         kernel_ulong_t val;
  73         const char *str;
  74 };
  75
  76 struct strval64 {
  77         uint64_t val;
  78         const char *str;
  79 };
  80
  81 #define STR16 "0123456789abcdef"
  82 #define STR64 STR16 STR16 STR16 STR16
  83
  84 int
  85 main(void)
  86 {
  87         enum {
  88                 PATH1_SIZE = 64,
  89         };
  90
  91         static const kernel_ulong_t fds[] = {
  92                 (kernel_ulong_t) 0xdeadfeed12345678ULL,
  93                 (kernel_ulong_t) 0xffffffff00000000ULL,
  94                 (kernel_ulong_t) 0xdeb0d1edffffffffULL,
  95         };
  96         static const struct strval flags[] = {
  97                 { (kernel_ulong_t) 0xffffffff00000000ULL, "0" },
  98                 { (kernel_ulong_t) 0xdec0deddefaced00ULL,
  99                         "0xefaced00 /* FAN_MARK_??? */" },
 100                 { (kernel_ulong_t) 0xda7a105700000040ULL,
 101                         "FAN_MARK_IGNORED_SURV_MODIFY" },
 102                 { (kernel_ulong_t) 0xbadc0deddeadfeedULL,
 103                         "FAN_MARK_ADD|FAN_MARK_DONT_FOLLOW|FAN_MARK_ONLYDIR|"
 104                         "FAN_MARK_IGNORED_MASK|FAN_MARK_IGNORED_SURV_MODIFY|"
 105                         "FAN_MARK_FLUSH|0xdeadfe00" },
 106         };
 107         static const struct strval64 masks[] = {
 108                 { ARG_ULL_STR(0) },
 109                 { 0xdeadfeedfacebeefULL,
 110                         "FAN_ACCESS|FAN_MODIFY|FAN_CLOSE_WRITE|FAN_OPEN|"
 111                         "FAN_ACCESS_PERM|FAN_ONDIR|FAN_EVENT_ON_CHILD|"
 112                         "0xdeadfeedb2ccbec4" },
 113                 { ARG_ULL_STR(0xffffffffb7fcbfc4) " /* FAN_??? */" },
 114         };
 115         static const struct strval dirfds[] = {
 116                 { (kernel_ulong_t) 0xfacefeed00000001ULL, "1" },
 117                 { (kernel_ulong_t) 0xdec0ded0ffffffffULL, "FAN_NOFD" },
 118                 { (kernel_ulong_t) 0xbadfacedffffff9cULL, "AT_FDCWD" },
 119                 { (kernel_ulong_t) 0xdefaced1beeff00dULL, "-1091571699" },
 120         };
 121         static const char str64[] = STR64;
 122
 123         static char bogus_path1_addr[sizeof("0x") + sizeof(void *) * 2];
 124         static char bogus_path1_after_addr[sizeof("0x") + sizeof(void *) * 2];
 125
 126         char *bogus_path1 = tail_memdup(str64, PATH1_SIZE);
 127         char *bogus_path2 = tail_memdup(str64, sizeof(str64));
 128
 129         struct strval paths[] = {
 130                 { (kernel_ulong_t) 0, "NULL" },
 131                 { (kernel_ulong_t) (uintptr_t) (bogus_path1 + PATH1_SIZE),
 132                         bogus_path1_after_addr },
 133                 { (kernel_ulong_t) (uintptr_t) bogus_path1, bogus_path1_addr },
 134                 { (kernel_ulong_t) (uintptr_t) bogus_path2, "\"" STR64 "\"" },
 135         };
 136
 137         unsigned int i;
 138         unsigned int j;
 139         unsigned int k;
 140         unsigned int l;
 141         unsigned int m;
 142         int rc;
 143
 144
 145         snprintf(bogus_path1_addr, sizeof(bogus_path1_addr), "%p", bogus_path1);
 146         snprintf(bogus_path1_after_addr, sizeof(bogus_path1_after_addr), "%p",
 147                 bogus_path1 + PATH1_SIZE);
 148
 149         rc = fanotify_mark(-1, FAN_MARK_ADD, FAN_MODIFY | FAN_ONDIR,
 150                                -100, ".");
 151         printf("fanotify_mark(-1, FAN_MARK_ADD, FAN_MODIFY|FAN_ONDIR"
 152                ", AT_FDCWD, \".\") = %s\n", sprintrc(rc));
 153
 154         for (i = 0; i < ARRAY_SIZE(fds); i++) {
 155                 for (j = 0; j < ARRAY_SIZE(flags); j++) {
 156                         for (k = 0; k < ARRAY_SIZE(masks); k++) {
 157                                 for (l = 0; l < ARRAY_SIZE(dirfds); l++) {
 158                                         for (m = 0; m < ARRAY_SIZE(paths); m++)
 159                                                 do_call(fds[i],
 160                                                         flags[j].val,
 161                                                         flags[j].str,
 162                                                         masks[k].val,
 163                                                         masks[k].str,
 164                                                         dirfds[l].val,
 165                                                         dirfds[l].str,
 166                                                         paths[m].val,
 167                                                         paths[m].str);
 168                                 }
 169                         }
 170                 }
 171         }
 172
 173         puts("+++ exited with 0 +++");
 174         return 0;
 175 }
 176
 177 #else
 178
 179 SKIP_MAIN_UNDEFINED("HAVE_SYS_FANOTIFY_H && HAVE_FANOTIFY_MARK && "
 180                     "__NR_fanotify_mark")
 181
 182 #endif