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light: better ERR reporting in _update_versionlink()

This commit is contained in:
Thomas Schoebel-Theuer 2012-08-27 15:30:58 +02:00 committed by Thomas Schoebel-Theuer
parent 439926c584
commit 64849f9949
1 changed files with 23 additions and 3 deletions
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26
sy_old/mars_light.c
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@ -1435,9 +1435,29 @@ int _update_versionlink(struct mars_global *global, const char *parent_path, con
* useless/disturbing timestamp updates)
*/
check = mars_find_dent(global, new);
if (check && check->new_link && !strcmp(check->new_link, old)) {
MARS_DBG("version symlink '%s' -> '%s' has not changed\n", old, new);
goto out;
if (likely(check && check->new_link)) {
loff_t old_start_pos;
loff_t old_end_pos;
int count;
int pos;
if (!strcmp(check->new_link, old)) {
MARS_DBG("version symlink '%s' -> '%s' has not changed\n", old, new);
goto out;
}
count = 0;
pos = 0;
do {
if (unlikely(!check->new_link[pos])) {
MARS_ERR("cannot scan old version symlink '%s', pos=%d\n", check->new_link, pos);
goto out;
}
} while (check->new_link[pos++] != ',' || !count++);
count = sscanf(check->new_link + pos, "%lld,%lld", &old_start_pos, &old_end_pos);
if (unlikely(count != 2)) {
MARS_ERR("cannot sscanf() old version symlink '%s', pos=%d, count=%d\n", check->new_link, pos, count);
} else if (unlikely(old_start_pos > start_pos || old_end_pos > end_pos)) {
MARS_ERR("BACKSKIP old version symlink '%s', new host='%s', sequence=%d, start_pos=%lld, end_pos=%lld\n", check->new_link, host, sequence, start_pos, end_pos);
}
}
get_lamport(&now);