src/journal/test-journal-interleaving.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2013 Marius Vollmer
   7   Copyright 2013 Zbigniew Jędrzejewski-Szmek
   8
   9   systemd is free software; you can redistribute it and/or modify it
  10   under the terms of the GNU Lesser General Public License as published by
  11   the Free Software Foundation; either version 2.1 of the License, or
  12   (at your option) any later version.
  13
  14   systemd is distributed in the hope that it will be useful, but
  15   WITHOUT ANY WARRANTY; without even the implied warranty of
  16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17   Lesser General Public License for more details.
  18
  19   You should have received a copy of the GNU Lesser General Public License
  20   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  21 ***/
  22
  23 #include <unistd.h>
  24 #include <fcntl.h>
  25
  26 #include <systemd/sd-journal.h>
  27
  28 #include "journal-file.h"
  29 #include "journal-internal.h"
  30 #include "journal-vacuum.h"
  31 #include "util.h"
  32 #include "log.h"
  33
  34 /* This program tests skipping around in a multi-file journal.
  35  */
  36
  37 static bool arg_keep = false;
  38
  39 _noreturn_ static void log_assert_errno(const char *text, int eno, const char *file, int line, const char *func) {
  40         log_meta(LOG_CRIT, file, line, func,
  41                  "'%s' failed at %s:%u (%s): %s.",
  42                  text, file, line, func, strerror(eno));
  43         abort();
  44 }
  45
  46 #define assert_ret(expr)                                                \
  47         do {                                                            \
  48                 int _r_ = (expr);                                       \
  49                 if (_unlikely_(_r_ < 0))                                \
  50                         log_assert_errno(#expr, -_r_, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
  51         } while (false)
  52
  53 static JournalFile *test_open (const char *name)
  54 {
  55         JournalFile *f;
  56         assert_ret(journal_file_open(name, O_RDWR|O_CREAT, 0644, true, false, NULL, NULL, NULL, &f));
  57         return f;
  58 }
  59
  60 static void test_close (JournalFile *f)
  61 {
  62         journal_file_close (f);
  63 }
  64
  65 static void append_number(JournalFile *f, int n, uint64_t *seqnum)
  66 {
  67         char *p;
  68         dual_timestamp ts;
  69         struct iovec iovec[1];
  70
  71         dual_timestamp_get(&ts);
  72
  73         assert_se(asprintf(&p, "NUMBER=%d", n) >= 0);
  74         iovec[0].iov_base = p;
  75         iovec[0].iov_len = strlen(p);
  76         assert_ret(journal_file_append_entry(f, &ts, iovec, 1, seqnum, NULL, NULL));
  77         free (p);
  78 }
  79
  80 static void test_check_number (sd_journal *j, int n)
  81 {
  82         const void *d;
  83         char *k;
  84         size_t l;
  85         int x;
  86
  87         assert_ret(sd_journal_get_data(j, "NUMBER", &d, &l));
  88         assert_se(k = strndup(d, l));
  89         printf("%s\n", k);
  90
  91         assert_se(safe_atoi(k + 7, &x) >= 0);
  92         assert_se(n == x);
  93 }
  94
  95 static void test_check_numbers_down (sd_journal *j, int count)
  96 {
  97         for (int i = 1; i <= count; i++) {
  98                 int r;
  99                 test_check_number(j, i);
 100                 assert_ret(r = sd_journal_next(j));
 101                 if (i == count)
 102                         assert_se(r == 0);
 103                 else
 104                         assert_se(r == 1);
 105         }
 106
 107 }
 108
 109 static void test_check_numbers_up (sd_journal *j, int count)
 110 {
 111         for (int i = count; i >= 1; i--) {
 112                 int r;
 113                 test_check_number(j, i);
 114                 assert_ret(r = sd_journal_previous(j));
 115                 if (i == 1)
 116                         assert_se(r == 0);
 117                 else
 118                         assert_se(r == 1);
 119         }
 120
 121 }
 122
 123 static void setup_sequential(void) {
 124         JournalFile *one, *two;
 125         one = test_open("one.journal");
 126         two = test_open("two.journal");
 127         append_number(one, 1, NULL);
 128         append_number(one, 2, NULL);
 129         append_number(two, 3, NULL);
 130         append_number(two, 4, NULL);
 131         test_close(one);
 132         test_close(two);
 133 }
 134
 135 static void setup_interleaved(void) {
 136         JournalFile *one, *two;
 137         one = test_open("one.journal");
 138         two = test_open("two.journal");
 139         append_number(one, 1, NULL);
 140         append_number(two, 2, NULL);
 141         append_number(one, 3, NULL);
 142         append_number(two, 4, NULL);
 143         test_close(one);
 144         test_close(two);
 145 }
 146
 147 static void test_skip(void (*setup)(void))
 148 {
 149         char t[] = "/tmp/journal-skip-XXXXXX";
 150         sd_journal *j;
 151         int r;
 152
 153         assert_se(mkdtemp(t));
 154         assert_se(chdir(t) >= 0);
 155
 156         setup();
 157
 158         /* Seek to head, iterate down.
 159          */
 160         assert_ret(sd_journal_open_directory(&j, t, 0));
 161         assert_ret(sd_journal_seek_head(j));
 162         assert_ret(sd_journal_next(j));
 163         test_check_numbers_down(j, 4);
 164         sd_journal_close(j);
 165
 166         /* Seek to tail, iterate up.
 167          */
 168         assert_ret(sd_journal_open_directory(&j, t, 0));
 169         assert_ret(sd_journal_seek_tail(j));
 170         assert_ret(sd_journal_previous(j));
 171         test_check_numbers_up(j, 4);
 172         sd_journal_close(j);
 173
 174         /* Seek to tail, skip to head, iterate down.
 175          */
 176         assert_ret(sd_journal_open_directory(&j, t, 0));
 177         assert_ret(sd_journal_seek_tail(j));
 178         assert_ret(r = sd_journal_previous_skip(j, 4));
 179         assert_se(r == 4);
 180         test_check_numbers_down(j, 4);
 181         sd_journal_close(j);
 182
 183         /* Seek to head, skip to tail, iterate up.
 184          */
 185         assert_ret(sd_journal_open_directory(&j, t, 0));
 186         assert_ret(sd_journal_seek_head(j));
 187         assert_ret(r = sd_journal_next_skip(j, 4));
 188         assert_se(r == 4);
 189         test_check_numbers_up(j, 4);
 190         sd_journal_close(j);
 191
 192         log_info("Done...");
 193
 194         if (arg_keep)
 195                 log_info("Not removing %s", t);
 196         else {
 197                 journal_directory_vacuum(".", 3000000, 0, 0, NULL);
 198
 199                 assert_se(rm_rf_dangerous(t, false, true, false) >= 0);
 200         }
 201
 202         puts("------------------------------------------------------------");
 203 }
 204
 205 static void test_sequence_numbers(void) {
 206
 207         char t[] = "/tmp/journal-seq-XXXXXX";
 208         JournalFile *one, *two;
 209         uint64_t seqnum = 0;
 210         sd_id128_t seqnum_id;
 211
 212         assert_se(mkdtemp(t));
 213         assert_se(chdir(t) >= 0);
 214
 215         assert_se(journal_file_open("one.journal", O_RDWR|O_CREAT, 0644,
 216                                     true, false, NULL, NULL, NULL, &one) == 0);
 217
 218         append_number(one, 1, &seqnum);
 219         printf("seqnum=%"PRIu64"\n", seqnum);
 220         assert(seqnum == 1);
 221         append_number(one, 2, &seqnum);
 222         printf("seqnum=%"PRIu64"\n", seqnum);
 223         assert(seqnum == 2);
 224
 225         assert(one->header->state == STATE_ONLINE);
 226         assert(!sd_id128_equal(one->header->file_id, one->header->machine_id));
 227         assert(!sd_id128_equal(one->header->file_id, one->header->boot_id));
 228         assert(sd_id128_equal(one->header->file_id, one->header->seqnum_id));
 229
 230         memcpy(&seqnum_id, &one->header->seqnum_id, sizeof(sd_id128_t));
 231
 232         assert_se(journal_file_open("two.journal", O_RDWR|O_CREAT, 0644,
 233                                     true, false, NULL, NULL, one, &two) == 0);
 234
 235         assert(two->header->state == STATE_ONLINE);
 236         assert(!sd_id128_equal(two->header->file_id, one->header->file_id));
 237         assert(sd_id128_equal(one->header->machine_id, one->header->machine_id));
 238         assert(sd_id128_equal(one->header->boot_id, one->header->boot_id));
 239         assert(sd_id128_equal(one->header->seqnum_id, one->header->seqnum_id));
 240
 241         append_number(two, 3, &seqnum);
 242         printf("seqnum=%"PRIu64"\n", seqnum);
 243         assert(seqnum == 3);
 244         append_number(two, 4, &seqnum);
 245         printf("seqnum=%"PRIu64"\n", seqnum);
 246         assert(seqnum == 4);
 247
 248         test_close(two);
 249
 250         append_number(one, 5, &seqnum);
 251         printf("seqnum=%"PRIu64"\n", seqnum);
 252         assert(seqnum == 5);
 253
 254         append_number(one, 6, &seqnum);
 255         printf("seqnum=%"PRIu64"\n", seqnum);
 256         assert(seqnum == 6);
 257
 258         test_close(one);
 259
 260         /* restart server */
 261         seqnum = 0;
 262
 263         assert_se(journal_file_open("two.journal", O_RDWR, 0,
 264                                     true, false, NULL, NULL, NULL, &two) == 0);
 265
 266         assert(sd_id128_equal(two->header->seqnum_id, seqnum_id));
 267
 268         append_number(two, 7, &seqnum);
 269         printf("seqnum=%"PRIu64"\n", seqnum);
 270         assert(seqnum == 5);
 271
 272         /* So..., here we have the same seqnum in two files with the
 273          * same seqnum_id. */
 274
 275         test_close(two);
 276
 277         log_info("Done...");
 278
 279         if (arg_keep)
 280                 log_info("Not removing %s", t);
 281         else {
 282                 journal_directory_vacuum(".", 3000000, 0, 0, NULL);
 283
 284                 assert_se(rm_rf_dangerous(t, false, true, false) >= 0);
 285         }
 286 }
 287
 288 int main(int argc, char *argv[]) {
 289         log_set_max_level(LOG_DEBUG);
 290
 291         /* journal_file_open requires a valid machine id */
 292         if (access("/etc/machine-id", F_OK) != 0)
 293                 return EXIT_TEST_SKIP;
 294
 295         arg_keep = argc > 1;
 296
 297         test_skip(setup_sequential);
 298         test_skip(setup_interleaved);
 299
 300         test_sequence_numbers();
 301
 302         return 0;
 303 }