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light: fix race in logfile switching

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This commit is contained in:
Thomas Schoebel-Theuer 2014-03-08 07:56:37 +01:00
parent f45c3fbdd3
commit b32927a20d
1 changed files with 8 additions and 0 deletions
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8
kernel/sy_old/mars_light.c
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@ -2576,6 +2576,13 @@ int _check_logging_status(struct mars_rotate *rot, int *log_nr, long long *oldpo
CHECK_PTR_NULL(global, done);
CHECK_PTR(rot->replay_link, done);
CHECK_PTR(rot->aio_brick, done);
CHECK_PTR(rot->aio_dent, done);
MARS_DBG(" dent = '%s'\n", dent->d_path);
MARS_DBG("aio_dent = '%s'\n", rot->aio_dent->d_path);
if (unlikely(strcmp(dent->d_path, rot->aio_dent->d_path))) {
goto done;
}
if (sscanf(rot->replay_link->d_argv[0], "log-%d", log_nr) != 1) {
MARS_ERR_TO(rot->log_say, "replay link has malformed logfile number '%s'\n", rot->replay_link->d_argv[0]);
@ -2672,6 +2679,7 @@ int _make_logging_status(struct mars_rotate *rot)
/* Find current logging status.
*/
status = _check_logging_status(rot, &log_nr, &start_pos, &dirty_pos, &end_pos);
MARS_DBG("case = %d (todo_primary=%d is_primary=%d old_is_primary=%d)\n", status, rot->todo_primary, rot->is_primary, rot->old_is_primary);
if (status < 0) {
goto done;
}