110 static int __hfs_ext_write_extent(struct inode *inode, struct hfs_find_data *fd)  in __hfs_ext_write_extent()  argument
114 	hfs_ext_build_key(fd->search_key, inode->i_ino, HFS_I(inode)->cached_start,  in __hfs_ext_write_extent()
115 			  HFS_IS_RSRC(inode) ?  HFS_FK_RSRC : HFS_FK_DATA);  in __hfs_ext_write_extent()
117 	if (HFS_I(inode)->flags & HFS_FLG_EXT_NEW) {  in __hfs_ext_write_extent()
120 		hfs_brec_insert(fd, HFS_I(inode)->cached_extents, sizeof(hfs_extent_rec));  in __hfs_ext_write_extent()
121 		HFS_I(inode)->flags &= ~(HFS_FLG_EXT_DIRTY|HFS_FLG_EXT_NEW);  in __hfs_ext_write_extent()
125 		hfs_bnode_write(fd->bnode, HFS_I(inode)->cached_extents, fd->entryoffset, fd->entrylength);  in __hfs_ext_write_extent()
126 		HFS_I(inode)->flags &= ~HFS_FLG_EXT_DIRTY;  in __hfs_ext_write_extent()
131 int hfs_ext_write_extent(struct inode *inode)  in hfs_ext_write_extent()  argument
136 	if (HFS_I(inode)->flags & HFS_FLG_EXT_DIRTY) {  in hfs_ext_write_extent()
137 		res = hfs_find_init(HFS_SB(inode->i_sb)->ext_tree, &fd);  in hfs_ext_write_extent()
140 		res = __hfs_ext_write_extent(inode, &fd);  in hfs_ext_write_extent()
165 static inline int __hfs_ext_cache_extent(struct hfs_find_data *fd, struct inode *inode, u32 block)  in __hfs_ext_cache_extent()  argument
169 	if (HFS_I(inode)->flags & HFS_FLG_EXT_DIRTY) {  in __hfs_ext_cache_extent()
170 		res = __hfs_ext_write_extent(inode, fd);  in __hfs_ext_cache_extent()
175 	res = __hfs_ext_read_extent(fd, HFS_I(inode)->cached_extents, inode->i_ino,  in __hfs_ext_cache_extent()
176 				    block, HFS_IS_RSRC(inode) ? HFS_FK_RSRC : HFS_FK_DATA);  in __hfs_ext_cache_extent()
178 		HFS_I(inode)->cached_start = be16_to_cpu(fd->key->ext.FABN);  in __hfs_ext_cache_extent()
179 		HFS_I(inode)->cached_blocks = hfs_ext_block_count(HFS_I(inode)->cached_extents);  in __hfs_ext_cache_extent()
181 		HFS_I(inode)->cached_start = HFS_I(inode)->cached_blocks = 0;  in __hfs_ext_cache_extent()
182 		HFS_I(inode)->flags &= ~(HFS_FLG_EXT_DIRTY|HFS_FLG_EXT_NEW);  in __hfs_ext_cache_extent()
187 static int hfs_ext_read_extent(struct inode *inode, u16 block)  in hfs_ext_read_extent()  argument
192 	if (block >= HFS_I(inode)->cached_start &&  in hfs_ext_read_extent()
193 	    block < HFS_I(inode)->cached_start + HFS_I(inode)->cached_blocks)  in hfs_ext_read_extent()
196 	res = hfs_find_init(HFS_SB(inode->i_sb)->ext_tree, &fd);  in hfs_ext_read_extent()
198 		res = __hfs_ext_cache_extent(&fd, inode, block);  in hfs_ext_read_extent()
332 int hfs_get_block(struct inode *inode, sector_t block,  in hfs_get_block()  argument
339 	sb = inode->i_sb;  in hfs_get_block()
343 	if (block >= HFS_I(inode)->fs_blocks) {  in hfs_get_block()
344 		if (block > HFS_I(inode)->fs_blocks || !create)  in hfs_get_block()
346 		if (ablock >= HFS_I(inode)->alloc_blocks) {  in hfs_get_block()
347 			res = hfs_extend_file(inode);  in hfs_get_block()
354 	if (ablock < HFS_I(inode)->first_blocks) {  in hfs_get_block()
355 		dblock = hfs_ext_find_block(HFS_I(inode)->first_extents, ablock);  in hfs_get_block()
359 	mutex_lock(&HFS_I(inode)->extents_lock);  in hfs_get_block()
360 	res = hfs_ext_read_extent(inode, ablock);  in hfs_get_block()
362 		dblock = hfs_ext_find_block(HFS_I(inode)->cached_extents,  in hfs_get_block()
363 					    ablock - HFS_I(inode)->cached_start);  in hfs_get_block()
365 		mutex_unlock(&HFS_I(inode)->extents_lock);  in hfs_get_block()
368 	mutex_unlock(&HFS_I(inode)->extents_lock);  in hfs_get_block()
377 		HFS_I(inode)->phys_size += sb->s_blocksize;  in hfs_get_block()
378 		HFS_I(inode)->fs_blocks++;  in hfs_get_block()
379 		inode_add_bytes(inode, sb->s_blocksize);  in hfs_get_block()
380 		mark_inode_dirty(inode);  in hfs_get_block()
385 int hfs_extend_file(struct inode *inode)  in hfs_extend_file()  argument
387 	struct super_block *sb = inode->i_sb;  in hfs_extend_file()
391 	mutex_lock(&HFS_I(inode)->extents_lock);  in hfs_extend_file()
392 	if (HFS_I(inode)->alloc_blocks == HFS_I(inode)->first_blocks)  in hfs_extend_file()
393 		goal = hfs_ext_lastblock(HFS_I(inode)->first_extents);  in hfs_extend_file()
395 		res = hfs_ext_read_extent(inode, HFS_I(inode)->alloc_blocks);  in hfs_extend_file()
398 		goal = hfs_ext_lastblock(HFS_I(inode)->cached_extents);  in hfs_extend_file()
401 	len = HFS_I(inode)->clump_blocks;  in hfs_extend_file()
408 	hfs_dbg(EXTENT, "extend %lu: %u,%u\n", inode->i_ino, start, len);  in hfs_extend_file()
409 	if (HFS_I(inode)->alloc_blocks == HFS_I(inode)->first_blocks) {  in hfs_extend_file()
410 		if (!HFS_I(inode)->first_blocks) {  in hfs_extend_file()
413 			HFS_I(inode)->first_extents[0].block = cpu_to_be16(start);  in hfs_extend_file()
414 			HFS_I(inode)->first_extents[0].count = cpu_to_be16(len);  in hfs_extend_file()
418 			res = hfs_add_extent(HFS_I(inode)->first_extents,  in hfs_extend_file()
419 					     HFS_I(inode)->alloc_blocks,  in hfs_extend_file()
425 			hfs_dump_extent(HFS_I(inode)->first_extents);  in hfs_extend_file()
426 			HFS_I(inode)->first_blocks += len;  in hfs_extend_file()
429 		res = hfs_add_extent(HFS_I(inode)->cached_extents,  in hfs_extend_file()
430 				     HFS_I(inode)->alloc_blocks -  in hfs_extend_file()
431 				     HFS_I(inode)->cached_start,  in hfs_extend_file()
434 			hfs_dump_extent(HFS_I(inode)->cached_extents);  in hfs_extend_file()
435 			HFS_I(inode)->flags |= HFS_FLG_EXT_DIRTY;  in hfs_extend_file()
436 			HFS_I(inode)->cached_blocks += len;  in hfs_extend_file()
441 	mutex_unlock(&HFS_I(inode)->extents_lock);  in hfs_extend_file()
443 		HFS_I(inode)->alloc_blocks += len;  in hfs_extend_file()
444 		mark_inode_dirty(inode);  in hfs_extend_file()
445 		if (inode->i_ino < HFS_FIRSTUSER_CNID)  in hfs_extend_file()
454 	res = hfs_ext_write_extent(inode);  in hfs_extend_file()
458 	memset(HFS_I(inode)->cached_extents, 0, sizeof(hfs_extent_rec));  in hfs_extend_file()
459 	HFS_I(inode)->cached_extents[0].block = cpu_to_be16(start);  in hfs_extend_file()
460 	HFS_I(inode)->cached_extents[0].count = cpu_to_be16(len);  in hfs_extend_file()
461 	hfs_dump_extent(HFS_I(inode)->cached_extents);  in hfs_extend_file()
462 	HFS_I(inode)->flags |= HFS_FLG_EXT_DIRTY|HFS_FLG_EXT_NEW;  in hfs_extend_file()
463 	HFS_I(inode)->cached_start = HFS_I(inode)->alloc_blocks;  in hfs_extend_file()
464 	HFS_I(inode)->cached_blocks = len;  in hfs_extend_file()
470 void hfs_file_truncate(struct inode *inode)  in hfs_file_truncate()  argument
472 	struct super_block *sb = inode->i_sb;  in hfs_file_truncate()
479 		inode->i_ino, (long long)HFS_I(inode)->phys_size,  in hfs_file_truncate()
480 		inode->i_size);  in hfs_file_truncate()
481 	if (inode->i_size > HFS_I(inode)->phys_size) {  in hfs_file_truncate()
482 		struct address_space *mapping = inode->i_mapping;  in hfs_file_truncate()
487 		size = inode->i_size - 1;  in hfs_file_truncate()
495 			inode->i_size = HFS_I(inode)->phys_size;  in hfs_file_truncate()
497 	} else if (inode->i_size == HFS_I(inode)->phys_size)  in hfs_file_truncate()
499 	size = inode->i_size + HFS_SB(sb)->alloc_blksz - 1;  in hfs_file_truncate()
501 	alloc_cnt = HFS_I(inode)->alloc_blocks;  in hfs_file_truncate()
505 	mutex_lock(&HFS_I(inode)->extents_lock);  in hfs_file_truncate()
508 		mutex_unlock(&HFS_I(inode)->extents_lock);  in hfs_file_truncate()
513 		if (alloc_cnt == HFS_I(inode)->first_blocks) {  in hfs_file_truncate()
514 			hfs_free_extents(sb, HFS_I(inode)->first_extents,  in hfs_file_truncate()
516 			hfs_dump_extent(HFS_I(inode)->first_extents);  in hfs_file_truncate()
517 			HFS_I(inode)->first_blocks = blk_cnt;  in hfs_file_truncate()
520 		res = __hfs_ext_cache_extent(&fd, inode, alloc_cnt);  in hfs_file_truncate()
523 		start = HFS_I(inode)->cached_start;  in hfs_file_truncate()
524 		hfs_free_extents(sb, HFS_I(inode)->cached_extents,  in hfs_file_truncate()
526 		hfs_dump_extent(HFS_I(inode)->cached_extents);  in hfs_file_truncate()
528 			HFS_I(inode)->flags |= HFS_FLG_EXT_DIRTY;  in hfs_file_truncate()
532 		HFS_I(inode)->cached_start = HFS_I(inode)->cached_blocks = 0;  in hfs_file_truncate()
533 		HFS_I(inode)->flags &= ~(HFS_FLG_EXT_DIRTY|HFS_FLG_EXT_NEW);  in hfs_file_truncate()
537 	mutex_unlock(&HFS_I(inode)->extents_lock);  in hfs_file_truncate()
539 	HFS_I(inode)->alloc_blocks = blk_cnt;  in hfs_file_truncate()
541 	HFS_I(inode)->phys_size = inode->i_size;  in hfs_file_truncate()
542 	HFS_I(inode)->fs_blocks = (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;  in hfs_file_truncate()
543 	inode_set_bytes(inode, HFS_I(inode)->fs_blocks << sb->s_blocksize_bits);  in hfs_file_truncate()
544 	mark_inode_dirty(inode);  in hfs_file_truncate()