fs/erofs/zmap.c

13 	unsigned long lcn;
24 				      unsigned long lcn)
30 			lcn * sizeof(struct z_erofs_lcluster_index);
37 	m->lcn = lcn;
101 					 unsigned long lcn, bool lookahead)
116 	if (lcn >= totalidx || lclusterbits > 14)
119 	m->lcn = lcn;
129 	if (lcn >= compacted_4b_initial) {
131 		lcn -= compacted_4b_initial;
132 		if (lcn < compacted_2b) {
136 			lcn -= compacted_2b;
139 	pos += lcn * (1 << amortizedshift);
241 					   unsigned int lcn, bool lookahead)
244 		erofs_err(m->inode->i_sb, "unknown type %u @ lcn %u of nid %llu",
245 				m->type, lcn, EROFS_I(m->inode)->nid);
252 		return z_erofs_load_full_lcluster(m, lcn);
254 		return z_erofs_load_compact_lcluster(m, lcn, lookahead);
267 	while (m->lcn >= lookback_distance) {
268 		unsigned long lcn = m->lcn - lookback_distance;
271 		err = z_erofs_load_lcluster_from_disk(m, lcn, false);
282 			m->map->m_la = (lcn << lclusterbits) | m->clusterofs;
286 	erofs_err(sb, "bogus lookback distance %u @ lcn %lu of nid %llu",
287 		  lookback_distance, m->lcn, vi->nid);
300 	unsigned long lcn = m->lcn + 1;
309 	    (lcn << vi->z_lclusterbits) >= inode->i_size)
315 	err = z_erofs_load_lcluster_from_disk(m, lcn, false);
327 	DBG_BUGON(lcn == initial_lcn &&
331 		erofs_err(sb, "bogus CBLKCNT @ lcn %lu of nid %llu", lcn, vi->nid);
353 	u64 lcn = m->lcn, headlcn = map->m_la >> lclusterbits;
358 		if ((lcn << lclusterbits) >= inode->i_size) {
363 		err = z_erofs_load_lcluster_from_disk(m, lcn, true);
374 			if (lcn != headlcn)
378 		lcn += m->delta[1];
380 	map->m_llen = (lcn << lclusterbits) + m->clusterofs - map->m_la;
420 	end = (m.lcn + 1ULL) << lclusterbits;
424 		map->m_la = (m.lcn << lclusterbits) | m.clusterofs;
434 			/* m.lcn should be >= 1 if endoff < m.clusterofs */
435 			if (!m.lcn) {
441 			end = (m.lcn << lclusterbits) | m.clusterofs;
455 		vi->z_tailextent_headlcn = m.lcn;
460 	if (ztailpacking && m.lcn == vi->z_tailextent_headlcn) {
470 	} else if (fragment && m.lcn == vi->z_tailextent_headlcn) {