fs/ext4/move_extent.c

66  * @orig_inode:		original inode structure to be released its lock first
71 ext4_double_up_write_data_sem(struct inode *orig_inode,
74 	up_write(&EXT4_I(orig_inode)->i_data_sem);
254 	struct inode *orig_inode = file_inode(o_filp);
258 	unsigned long blocksize = orig_inode->i_sb->s_blocksize;
262 	int from = data_offset_in_page << orig_inode->i_blkbits;
263 	int blocks_per_page = PAGE_SIZE >> orig_inode->i_blkbits;
264 	struct super_block *sb = orig_inode->i_sb;
273 	jblocks = ext4_writepage_trans_blocks(orig_inode) * 2;
274 	handle = ext4_journal_start(orig_inode, EXT4_HT_MOVE_EXTENTS, jblocks);
288 	    ((orig_inode->i_size - 1) >> orig_inode->i_blkbits)) {
290 		tmp_data_size = orig_inode->i_size & (blocksize - 1);
299 			((block_len_in_page - 1) << orig_inode->i_blkbits);
301 		data_size = block_len_in_page << orig_inode->i_blkbits;
305 	*err = mext_folio_double_lock(orig_inode, donor_inode, orig_page_offset,
322 		ext4_double_down_write_data_sem(orig_inode, donor_inode);
325 		unwritten = mext_check_coverage(orig_inode, orig_blk_offset,
336 			ext4_double_up_write_data_sem(orig_inode, donor_inode);
344 		replaced_count = ext4_swap_extents(handle, orig_inode,
349 		ext4_double_up_write_data_sem(orig_inode, donor_inode);
364 	ext4_double_down_write_data_sem(orig_inode, donor_inode);
365 	replaced_count = ext4_swap_extents(handle, orig_inode, donor_inode,
368 	ext4_double_up_write_data_sem(orig_inode, donor_inode);
373 				block_len_in_page << orig_inode->i_blkbits;
382 				1 << orig_inode->i_blkbits, 0);
386 		*err = ext4_get_block(orig_inode, orig_blk_offset + i, bh, 0);
396 	*err = ext4_jbd2_inode_add_write(handle, orig_inode,
422 	ext4_double_down_write_data_sem(orig_inode, donor_inode);
423 	replaced_count = ext4_swap_extents(handle, donor_inode, orig_inode,
426 	ext4_double_up_write_data_sem(orig_inode, donor_inode);
428 		ext4_error_inode_block(orig_inode, (sector_t)(orig_blk_offset),
440  * @orig_inode:		original inode
451 mext_check_arguments(struct inode *orig_inode,
456 	unsigned int blkbits = orig_inode->i_blkbits;
459 	orig_eof = (i_size_read(orig_inode) + blocksize - 1) >> blkbits;
466 			   orig_inode->i_ino, donor_inode->i_ino);
474 	if (IS_SWAPFILE(orig_inode) || IS_SWAPFILE(donor_inode)) {
476 			orig_inode->i_ino, donor_inode->i_ino);
480 	if (ext4_is_quota_file(orig_inode) && ext4_is_quota_file(donor_inode)) {
482 			orig_inode->i_ino, donor_inode->i_ino);
487 	if (!(ext4_test_inode_flag(orig_inode, EXT4_INODE_EXTENTS))) {
489 			"based file [ino:orig %lu]\n", orig_inode->i_ino);
497 	if ((!orig_inode->i_size) || (!donor_inode->i_size)) {
503 	if ((orig_start & ~(PAGE_MASK >> orig_inode->i_blkbits)) !=
504 	    (donor_start & ~(PAGE_MASK >> orig_inode->i_blkbits))) {
507 			orig_inode->i_ino, donor_inode->i_ino);
518 			orig_inode->i_ino, donor_inode->i_ino);
531 			"[ino:orig %lu, donor %lu]\n", orig_inode->i_ino,
557 	struct inode *orig_inode = file_inode(o_filp);
560 	int blocks_per_page = PAGE_SIZE >> orig_inode->i_blkbits;
565 	if (orig_inode->i_sb != donor_inode->i_sb) {
568 			orig_inode->i_ino, donor_inode->i_ino);
573 	if (orig_inode == donor_inode) {
576 			orig_inode->i_ino, donor_inode->i_ino);
581 	if (!S_ISREG(orig_inode->i_mode) || !S_ISREG(donor_inode->i_mode)) {
584 			orig_inode->i_ino, donor_inode->i_ino);
590 	if (ext4_should_journal_data(orig_inode) ||
592 		ext4_msg(orig_inode->i_sb, KERN_ERR,
597 	if (IS_ENCRYPTED(orig_inode) || IS_ENCRYPTED(donor_inode)) {
598 		ext4_msg(orig_inode->i_sb, KERN_ERR,
604 	lock_two_nondirectories(orig_inode, donor_inode);
607 	inode_dio_wait(orig_inode);
611 	ext4_double_down_write_data_sem(orig_inode, donor_inode);
613 	ret = mext_check_arguments(orig_inode, donor_inode, orig_blk,
627 		ret = get_ext_path(orig_inode, o_start, &path);
659 					       orig_inode->i_blkbits);
672 		ext4_double_up_write_data_sem(orig_inode, donor_inode);
678 		ext4_double_down_write_data_sem(orig_inode, donor_inode);
687 		ext4_discard_preallocations(orig_inode);
692 	ext4_double_up_write_data_sem(orig_inode, donor_inode);
693 	unlock_two_nondirectories(orig_inode, donor_inode);