1680 static void mpage_release_unused_pages(struct mpage_da_data *mpd,  in mpage_release_unused_pages()  argument
1686 	struct inode *inode = mpd->inode;  in mpage_release_unused_pages()
1690 	if (mpd->first_page >= mpd->next_page)  in mpage_release_unused_pages()
1693 	index = mpd->first_page;  in mpage_release_unused_pages()
1694 	end   = mpd->next_page - 1;  in mpage_release_unused_pages()
2195 static int mpage_submit_page(struct mpage_da_data *mpd, struct page *page)  in mpage_submit_page()  argument
2201 	BUG_ON(page->index != mpd->first_page);  in mpage_submit_page()
2216 	size = i_size_read(mpd->inode);  in mpage_submit_page()
2218 	    !ext4_verity_in_progress(mpd->inode))  in mpage_submit_page()
2222 	err = ext4_bio_write_page(&mpd->io_submit, page, len, mpd->wbc, false);  in mpage_submit_page()
2224 		mpd->wbc->nr_to_write--;  in mpage_submit_page()
2225 	mpd->first_page++;  in mpage_submit_page()
2253 static bool mpage_add_bh_to_extent(struct mpage_da_data *mpd, ext4_lblk_t lblk,  in mpage_add_bh_to_extent()  argument
2256 	struct ext4_map_blocks *map = &mpd->map;  in mpage_add_bh_to_extent()
2270 		if (!mpd->do_map)  in mpage_add_bh_to_extent()
2307 static int mpage_process_page_bufs(struct mpage_da_data *mpd,  in mpage_process_page_bufs()  argument
2312 	struct inode *inode = mpd->inode;  in mpage_process_page_bufs()
2323 		if (lblk >= blocks || !mpage_add_bh_to_extent(mpd, lblk, bh)) {  in mpage_process_page_bufs()
2325 			if (mpd->map.m_len)  in mpage_process_page_bufs()
2328 			if (!mpd->do_map)  in mpage_process_page_bufs()
2335 	if (mpd->map.m_len == 0) {  in mpage_process_page_bufs()
2336 		err = mpage_submit_page(mpd, head->b_page);  in mpage_process_page_bufs()
2357 static int mpage_map_and_submit_buffers(struct mpage_da_data *mpd)  in mpage_map_and_submit_buffers()  argument
2361 	struct inode *inode = mpd->inode;  in mpage_map_and_submit_buffers()
2369 	start = mpd->map.m_lblk >> bpp_bits;  in mpage_map_and_submit_buffers()
2370 	end = (mpd->map.m_lblk + mpd->map.m_len - 1) >> bpp_bits;  in mpage_map_and_submit_buffers()
2372 	pblock = mpd->map.m_pblk;  in mpage_map_and_submit_buffers()
2385 				if (lblk < mpd->map.m_lblk)  in mpage_map_and_submit_buffers()
2387 				if (lblk >= mpd->map.m_lblk + mpd->map.m_len) {  in mpage_map_and_submit_buffers()
2392 					mpd->map.m_len = 0;  in mpage_map_and_submit_buffers()
2393 					mpd->map.m_flags = 0;  in mpage_map_and_submit_buffers()
2401 					err = mpage_process_page_bufs(mpd, head,  in mpage_map_and_submit_buffers()
2420 			mpd->io_submit.io_end->size += PAGE_SIZE;  in mpage_map_and_submit_buffers()
2422 			err = mpage_submit_page(mpd, page);  in mpage_map_and_submit_buffers()
2431 	mpd->map.m_len = 0;  in mpage_map_and_submit_buffers()
2432 	mpd->map.m_flags = 0;  in mpage_map_and_submit_buffers()
2436 static int mpage_map_one_extent(handle_t *handle, struct mpage_da_data *mpd)  in mpage_map_one_extent()  argument
2438 	struct inode *inode = mpd->inode;  in mpage_map_one_extent()
2439 	struct ext4_map_blocks *map = &mpd->map;  in mpage_map_one_extent()
2472 		if (!mpd->io_submit.io_end->handle &&  in mpage_map_one_extent()
2474 			mpd->io_submit.io_end->handle = handle->h_rsv_handle;  in mpage_map_one_extent()
2477 		ext4_set_io_unwritten_flag(inode, mpd->io_submit.io_end);  in mpage_map_one_extent()
2505 				       struct mpage_da_data *mpd,  in mpage_map_and_submit_extent()  argument
2508 	struct inode *inode = mpd->inode;  in mpage_map_and_submit_extent()
2509 	struct ext4_map_blocks *map = &mpd->map;  in mpage_map_and_submit_extent()
2514 	mpd->io_submit.io_end->offset =  in mpage_map_and_submit_extent()
2517 		err = mpage_map_one_extent(handle, mpd);  in mpage_map_and_submit_extent()
2556 		err = mpage_map_and_submit_buffers(mpd);  in mpage_map_and_submit_extent()
2566 	disksize = ((loff_t)mpd->first_page) << PAGE_SHIFT;  in mpage_map_and_submit_extent()
2622 static int mpage_prepare_extent_to_map(struct mpage_da_data *mpd)  in mpage_prepare_extent_to_map()  argument
2624 	struct address_space *mapping = mpd->inode->i_mapping;  in mpage_prepare_extent_to_map()
2627 	long left = mpd->wbc->nr_to_write;  in mpage_prepare_extent_to_map()
2628 	pgoff_t index = mpd->first_page;  in mpage_prepare_extent_to_map()
2629 	pgoff_t end = mpd->last_page;  in mpage_prepare_extent_to_map()
2632 	int blkbits = mpd->inode->i_blkbits;  in mpage_prepare_extent_to_map()
2636 	if (mpd->wbc->sync_mode == WB_SYNC_ALL || mpd->wbc->tagged_writepages)  in mpage_prepare_extent_to_map()
2642 	mpd->map.m_len = 0;  in mpage_prepare_extent_to_map()
2643 	mpd->next_page = index;  in mpage_prepare_extent_to_map()
2661 			if (mpd->wbc->sync_mode == WB_SYNC_NONE && left <= 0)  in mpage_prepare_extent_to_map()
2665 			if (mpd->map.m_len > 0 && mpd->next_page != page->index)  in mpage_prepare_extent_to_map()
2678 			     (mpd->wbc->sync_mode == WB_SYNC_NONE)) ||  in mpage_prepare_extent_to_map()
2687 			if (mpd->map.m_len == 0)  in mpage_prepare_extent_to_map()
2688 				mpd->first_page = page->index;  in mpage_prepare_extent_to_map()
2689 			mpd->next_page = page->index + 1;  in mpage_prepare_extent_to_map()
2694 			err = mpage_process_page_bufs(mpd, head, head, lblk);  in mpage_prepare_extent_to_map()
2717 	struct mpage_da_data mpd;  in ext4_writepages()  local
2794 		mpd.first_page = writeback_index;  in ext4_writepages()
2795 		mpd.last_page = -1;  in ext4_writepages()
2797 		mpd.first_page = wbc->range_start >> PAGE_SHIFT;  in ext4_writepages()
2798 		mpd.last_page = wbc->range_end >> PAGE_SHIFT;  in ext4_writepages()
2801 	mpd.inode = inode;  in ext4_writepages()
2802 	mpd.wbc = wbc;  in ext4_writepages()
2803 	ext4_io_submit_init(&mpd.io_submit, wbc);  in ext4_writepages()
2806 		tag_pages_for_writeback(mapping, mpd.first_page, mpd.last_page);  in ext4_writepages()
2816 	mpd.do_map = 0;  in ext4_writepages()
2817 	mpd.io_submit.io_end = ext4_init_io_end(inode, GFP_KERNEL);  in ext4_writepages()
2818 	if (!mpd.io_submit.io_end) {  in ext4_writepages()
2822 	ret = mpage_prepare_extent_to_map(&mpd);  in ext4_writepages()
2824 	mpage_release_unused_pages(&mpd, false);  in ext4_writepages()
2826 	ext4_io_submit(&mpd.io_submit);  in ext4_writepages()
2827 	ext4_put_io_end_defer(mpd.io_submit.io_end);  in ext4_writepages()
2828 	mpd.io_submit.io_end = NULL;  in ext4_writepages()
2832 	while (!done && mpd.first_page <= mpd.last_page) {  in ext4_writepages()
2834 		mpd.io_submit.io_end = ext4_init_io_end(inode, GFP_KERNEL);  in ext4_writepages()
2835 		if (!mpd.io_submit.io_end) {  in ext4_writepages()
2859 			ext4_put_io_end(mpd.io_submit.io_end);  in ext4_writepages()
2860 			mpd.io_submit.io_end = NULL;  in ext4_writepages()
2863 		mpd.do_map = 1;  in ext4_writepages()
2865 		trace_ext4_da_write_pages(inode, mpd.first_page, mpd.wbc);  in ext4_writepages()
2866 		ret = mpage_prepare_extent_to_map(&mpd);  in ext4_writepages()
2868 			if (mpd.map.m_len)  in ext4_writepages()
2869 				ret = mpage_map_and_submit_extent(handle, &mpd,  in ext4_writepages()
2894 			mpd.do_map = 0;  in ext4_writepages()
2897 		mpage_release_unused_pages(&mpd, give_up_on_write);  in ext4_writepages()
2899 		ext4_io_submit(&mpd.io_submit);  in ext4_writepages()
2909 			ext4_put_io_end_defer(mpd.io_submit.io_end);  in ext4_writepages()
2912 			ext4_put_io_end(mpd.io_submit.io_end);  in ext4_writepages()
2913 		mpd.io_submit.io_end = NULL;  in ext4_writepages()
2933 		mpd.last_page = writeback_index - 1;  in ext4_writepages()
2934 		mpd.first_page = 0;  in ext4_writepages()
2944 		mapping->writeback_index = mpd.first_page;  in ext4_writepages()