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ITS#8486 Minor play_sessionlog cleanup

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Fix logmsg uuidstr.
Shortcut finding start of playback.
Allow dup CSNs in log, but with different UUIDs. All
non-present deletes in a refresh use the same CSN.
This commit is contained in:
Howard Chu 2020-09-19 13:35:47 +01:00 committed by Quanah Gibson-Mount
parent d2036cec90
commit 8f8774c0b1
1 changed files with 23 additions and 4 deletions
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27
servers/slapd/overlays/syncprov.c
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@ -430,8 +430,11 @@ static int
syncprov_sessionlog_cmp( const void *l, const void *r )
{
const slog_entry *left = l, *right = r;
int ret = ber_bvcmp( &left->se_csn, &right->se_csn );
if ( !ret )
ret = ber_bvcmp( &left->se_uuid, &right->se_uuid );
return ber_bvcmp( &left->se_csn, &right->se_csn );
return ret;
}
static int
@ -1701,7 +1704,7 @@ syncprov_add_slog( Operation *op )
sl->sl_num++;
if ( !sl->sl_playing && sl->sl_num > sl->sl_size ) {
TAvlnode *edge = tavl_end( sl->sl_entries, TAVL_DIR_LEFT );
while ( --sl->sl_num > sl->sl_size ) {
while ( sl->sl_num > sl->sl_size ) {
int i;
TAvlnode *next = tavl_next( edge, TAVL_DIR_RIGHT );
se = edge->avl_data;
@ -1723,8 +1726,10 @@ syncprov_add_slog( Operation *op )
op->o_log_prefix, se->se_sid, sl->sl_mincsn[i].bv_val, se->se_csn.bv_val );
ber_bvreplace( &sl->sl_mincsn[i], &se->se_csn );
}
tavl_delete( &sl->sl_entries, edge, syncprov_sessionlog_cmp );
tavl_delete( &sl->sl_entries, se, syncprov_sessionlog_cmp );
ch_free( se );
edge = next;
sl->sl_num--;
}
}
ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
@ -2014,7 +2019,19 @@ syncprov_play_sessionlog( Operation *op, SlapReply *rs, sync_control *srs,
* unlock the list mutex.
*/
assert( sl->sl_entries );
entry = tavl_end( sl->sl_entries, TAVL_DIR_LEFT );
/* Find first relevant log entry. If greater than mincsn, backtrack one entry */
{
slog_entry te = {0};
te.se_csn = *mincsn;
entry = tavl_find3( sl->sl_entries, &te, syncprov_sessionlog_cmp, &ndel );
}
if ( ndel > 0 && entry )
entry = tavl_next( entry, TAVL_DIR_LEFT );
/* if none, just start at beginning */
if ( !entry )
entry = tavl_end( sl->sl_entries, TAVL_DIR_LEFT );
do {
char uuidstr[40] = {};
slog_entry *se = entry->avl_data;
@ -2063,6 +2080,8 @@ syncprov_play_sessionlog( Operation *op, SlapReply *rs, sync_control *srs,
csns[j].bv_val[csns[j].bv_len] = '\0';
if ( LogTest( LDAP_DEBUG_SYNC ) ) {
lutil_uuidstr_from_normalized( uuids[j].bv_val, uuids[j].bv_len,
uuidstr, 40 );
Debug( LDAP_DEBUG_SYNC, "%s syncprov_play_sessionlog: "
"picking a %s entry uuid=%s cookie=%s\n",
op->o_log_prefix, se->se_tag == LDAP_REQ_DELETE ? "deleted" : "modified",