55 	struct ocfs2_extent_map_item *emi;  in __ocfs2_extent_map_lookup()  local
59 	list_for_each_entry(emi, &em->em_list, ei_list) {  in __ocfs2_extent_map_lookup()
60 		range = emi->ei_cpos + emi->ei_clusters;  in __ocfs2_extent_map_lookup()
62 		if (cpos >= emi->ei_cpos && cpos < range) {  in __ocfs2_extent_map_lookup()
63 			list_move(&emi->ei_list, &em->em_list);  in __ocfs2_extent_map_lookup()
65 			*ret_emi = emi;  in __ocfs2_extent_map_lookup()
77 	struct ocfs2_extent_map_item *emi;  in ocfs2_extent_map_lookup()  local
81 	__ocfs2_extent_map_lookup(&oi->ip_extent_map, cpos, &emi);  in ocfs2_extent_map_lookup()
82 	if (emi) {  in ocfs2_extent_map_lookup()
83 		coff = cpos - emi->ei_cpos;  in ocfs2_extent_map_lookup()
84 		*phys = emi->ei_phys + coff;  in ocfs2_extent_map_lookup()
86 			*len = emi->ei_clusters - coff;  in ocfs2_extent_map_lookup()
88 			*flags = emi->ei_flags;  in ocfs2_extent_map_lookup()
93 	if (emi == NULL)  in ocfs2_extent_map_lookup()
104 	struct ocfs2_extent_map_item *emi, *n;  in ocfs2_extent_map_trunc()  local
111 	list_for_each_entry_safe(emi, n, &em->em_list, ei_list) {  in ocfs2_extent_map_trunc()
112 		if (emi->ei_cpos >= cpos) {  in ocfs2_extent_map_trunc()
114 			list_move(&emi->ei_list, &tmp_list);  in ocfs2_extent_map_trunc()
120 		range = emi->ei_cpos + emi->ei_clusters;  in ocfs2_extent_map_trunc()
123 			emi->ei_clusters = cpos - emi->ei_cpos;  in ocfs2_extent_map_trunc()
128 	list_for_each_entry_safe(emi, n, &tmp_list, ei_list) {  in ocfs2_extent_map_trunc()
129 		list_del(&emi->ei_list);  in ocfs2_extent_map_trunc()
130 		kfree(emi);  in ocfs2_extent_map_trunc()
169  * Try to merge emi with ins. Returns 1 if merge succeeds, zero
172 static int ocfs2_try_to_merge_extent_map(struct ocfs2_extent_map_item *emi,  in ocfs2_try_to_merge_extent_map()  argument
178 	if (ins->ei_phys == (emi->ei_phys + emi->ei_clusters) &&  in ocfs2_try_to_merge_extent_map()
179 	    ins->ei_cpos == (emi->ei_cpos + emi->ei_clusters) &&  in ocfs2_try_to_merge_extent_map()
180 	    ins->ei_flags == emi->ei_flags) {  in ocfs2_try_to_merge_extent_map()
181 		emi->ei_clusters += ins->ei_clusters;  in ocfs2_try_to_merge_extent_map()
183 	} else if ((ins->ei_phys + ins->ei_clusters) == emi->ei_phys &&  in ocfs2_try_to_merge_extent_map()
184 		   (ins->ei_cpos + ins->ei_clusters) == emi->ei_cpos &&  in ocfs2_try_to_merge_extent_map()
185 		   ins->ei_flags == emi->ei_flags) {  in ocfs2_try_to_merge_extent_map()
186 		emi->ei_phys = ins->ei_phys;  in ocfs2_try_to_merge_extent_map()
187 		emi->ei_cpos = ins->ei_cpos;  in ocfs2_try_to_merge_extent_map()
188 		emi->ei_clusters += ins->ei_clusters;  in ocfs2_try_to_merge_extent_map()
197 	if (ocfs2_ei_is_contained(emi, ins) ||  in ocfs2_try_to_merge_extent_map()
198 	    ocfs2_ei_is_contained(ins, emi)) {  in ocfs2_try_to_merge_extent_map()
199 		ocfs2_copy_emi_fields(emi, ins);  in ocfs2_try_to_merge_extent_map()
220 	struct ocfs2_extent_map_item *emi, *new_emi = NULL;  in ocfs2_extent_map_insert_rec()  local
232 	list_for_each_entry(emi, &em->em_list, ei_list) {  in ocfs2_extent_map_insert_rec()
233 		if (ocfs2_try_to_merge_extent_map(emi, &ins)) {  in ocfs2_extent_map_insert_rec()
234 			list_move(&emi->ei_list, &em->em_list);  in ocfs2_extent_map_insert_rec()
264 		emi = list_entry(em->em_list.prev,  in ocfs2_extent_map_insert_rec()
266 		list_move(&emi->ei_list, &em->em_list);  in ocfs2_extent_map_insert_rec()
267 		ocfs2_copy_emi_fields(emi, &ins);  in ocfs2_extent_map_insert_rec()