1542 static void mpage_release_unused_pages(struct mpage_da_data *mpd,  in mpage_release_unused_pages()  argument
1548 	struct inode *inode = mpd->inode;  in mpage_release_unused_pages()
1552 	if (mpd->first_page >= mpd->next_page)  in mpage_release_unused_pages()
1555 	mpd->scanned_until_end = 0;  in mpage_release_unused_pages()
1556 	index = mpd->first_page;  in mpage_release_unused_pages()
1557 	end   = mpd->next_page - 1;  in mpage_release_unused_pages()
2071 static int mpage_submit_page(struct mpage_da_data *mpd, struct page *page)  in mpage_submit_page()  argument
2077 	BUG_ON(page->index != mpd->first_page);  in mpage_submit_page()
2092 	size = i_size_read(mpd->inode);  in mpage_submit_page()
2094 	    !ext4_verity_in_progress(mpd->inode))  in mpage_submit_page()
2098 	err = ext4_bio_write_page(&mpd->io_submit, page, len, false);  in mpage_submit_page()
2100 		mpd->wbc->nr_to_write--;  in mpage_submit_page()
2101 	mpd->first_page++;  in mpage_submit_page()
2129 static bool mpage_add_bh_to_extent(struct mpage_da_data *mpd, ext4_lblk_t lblk,  in mpage_add_bh_to_extent()  argument
2132 	struct ext4_map_blocks *map = &mpd->map;  in mpage_add_bh_to_extent()
2146 		if (!mpd->do_map)  in mpage_add_bh_to_extent()
2183 static int mpage_process_page_bufs(struct mpage_da_data *mpd,  in mpage_process_page_bufs()  argument
2188 	struct inode *inode = mpd->inode;  in mpage_process_page_bufs()
2199 		if (lblk >= blocks || !mpage_add_bh_to_extent(mpd, lblk, bh)) {  in mpage_process_page_bufs()
2201 			if (mpd->map.m_len)  in mpage_process_page_bufs()
2204 			if (!mpd->do_map)  in mpage_process_page_bufs()
2211 	if (mpd->map.m_len == 0) {  in mpage_process_page_bufs()
2212 		err = mpage_submit_page(mpd, head->b_page);  in mpage_process_page_bufs()
2217 		mpd->scanned_until_end = 1;  in mpage_process_page_bufs()
2238 static int mpage_process_page(struct mpage_da_data *mpd, struct page *page,  in mpage_process_page()  argument
2243 	ext4_io_end_t *io_end = mpd->io_submit.io_end;  in mpage_process_page()
2247 	int blkbits = mpd->inode->i_blkbits;  in mpage_process_page()
2253 		if (lblk < mpd->map.m_lblk)  in mpage_process_page()
2255 		if (lblk >= mpd->map.m_lblk + mpd->map.m_len) {  in mpage_process_page()
2260 			mpd->map.m_len = 0;  in mpage_process_page()
2261 			mpd->map.m_flags = 0;  in mpage_process_page()
2265 			err = mpage_process_page_bufs(mpd, head, bh, lblk);  in mpage_process_page()
2268 			if (!err && mpd->map.m_len && mpd->map.m_lblk > lblk) {  in mpage_process_page()
2274 				io_end_vec->offset = (loff_t)mpd->map.m_lblk << blkbits;  in mpage_process_page()
2310 static int mpage_map_and_submit_buffers(struct mpage_da_data *mpd)  in mpage_map_and_submit_buffers()  argument
2314 	struct inode *inode = mpd->inode;  in mpage_map_and_submit_buffers()
2322 	start = mpd->map.m_lblk >> bpp_bits;  in mpage_map_and_submit_buffers()
2323 	end = (mpd->map.m_lblk + mpd->map.m_len - 1) >> bpp_bits;  in mpage_map_and_submit_buffers()
2325 	pblock = mpd->map.m_pblk;  in mpage_map_and_submit_buffers()
2336 			err = mpage_process_page(mpd, page, &lblk, &pblock,  in mpage_map_and_submit_buffers()
2346 			err = mpage_submit_page(mpd, page);  in mpage_map_and_submit_buffers()
2353 	mpd->map.m_len = 0;  in mpage_map_and_submit_buffers()
2354 	mpd->map.m_flags = 0;  in mpage_map_and_submit_buffers()
2361 static int mpage_map_one_extent(handle_t *handle, struct mpage_da_data *mpd)  in mpage_map_one_extent()  argument
2363 	struct inode *inode = mpd->inode;  in mpage_map_one_extent()
2364 	struct ext4_map_blocks *map = &mpd->map;  in mpage_map_one_extent()
2397 		if (!mpd->io_submit.io_end->handle &&  in mpage_map_one_extent()
2399 			mpd->io_submit.io_end->handle = handle->h_rsv_handle;  in mpage_map_one_extent()
2402 		ext4_set_io_unwritten_flag(inode, mpd->io_submit.io_end);  in mpage_map_one_extent()
2430 				       struct mpage_da_data *mpd,  in mpage_map_and_submit_extent()  argument
2433 	struct inode *inode = mpd->inode;  in mpage_map_and_submit_extent()
2434 	struct ext4_map_blocks *map = &mpd->map;  in mpage_map_and_submit_extent()
2438 	ext4_io_end_t *io_end = mpd->io_submit.io_end;  in mpage_map_and_submit_extent()
2446 		err = mpage_map_one_extent(handle, mpd);  in mpage_map_and_submit_extent()
2485 		err = mpage_map_and_submit_buffers(mpd);  in mpage_map_and_submit_extent()
2495 	disksize = ((loff_t)mpd->first_page) << PAGE_SHIFT;  in mpage_map_and_submit_extent()
2552 static int mpage_prepare_extent_to_map(struct mpage_da_data *mpd)  in mpage_prepare_extent_to_map()  argument
2554 	struct address_space *mapping = mpd->inode->i_mapping;  in mpage_prepare_extent_to_map()
2557 	long left = mpd->wbc->nr_to_write;  in mpage_prepare_extent_to_map()
2558 	pgoff_t index = mpd->first_page;  in mpage_prepare_extent_to_map()
2559 	pgoff_t end = mpd->last_page;  in mpage_prepare_extent_to_map()
2562 	int blkbits = mpd->inode->i_blkbits;  in mpage_prepare_extent_to_map()
2566 	if (mpd->wbc->sync_mode == WB_SYNC_ALL || mpd->wbc->tagged_writepages)  in mpage_prepare_extent_to_map()
2572 	mpd->map.m_len = 0;  in mpage_prepare_extent_to_map()
2573 	mpd->next_page = index;  in mpage_prepare_extent_to_map()
2591 			if (mpd->wbc->sync_mode == WB_SYNC_NONE && left <= 0)  in mpage_prepare_extent_to_map()
2595 			if (mpd->map.m_len > 0 && mpd->next_page != page->index)  in mpage_prepare_extent_to_map()
2608 			     (mpd->wbc->sync_mode == WB_SYNC_NONE)) ||  in mpage_prepare_extent_to_map()
2617 			if (mpd->map.m_len == 0)  in mpage_prepare_extent_to_map()
2618 				mpd->first_page = page->index;  in mpage_prepare_extent_to_map()
2619 			mpd->next_page = page->index + 1;  in mpage_prepare_extent_to_map()
2624 			err = mpage_process_page_bufs(mpd, head, head, lblk);  in mpage_prepare_extent_to_map()
2633 	mpd->scanned_until_end = 1;  in mpage_prepare_extent_to_map()
2648 	struct mpage_da_data mpd;  in ext4_writepages()  local
2724 		mpd.first_page = writeback_index;  in ext4_writepages()
2725 		mpd.last_page = -1;  in ext4_writepages()
2727 		mpd.first_page = wbc->range_start >> PAGE_SHIFT;  in ext4_writepages()
2728 		mpd.last_page = wbc->range_end >> PAGE_SHIFT;  in ext4_writepages()
2731 	mpd.inode = inode;  in ext4_writepages()
2732 	mpd.wbc = wbc;  in ext4_writepages()
2733 	ext4_io_submit_init(&mpd.io_submit, wbc);  in ext4_writepages()
2736 		tag_pages_for_writeback(mapping, mpd.first_page, mpd.last_page);  in ext4_writepages()
2745 	mpd.do_map = 0;  in ext4_writepages()
2746 	mpd.scanned_until_end = 0;  in ext4_writepages()
2747 	mpd.io_submit.io_end = ext4_init_io_end(inode, GFP_KERNEL);  in ext4_writepages()
2748 	if (!mpd.io_submit.io_end) {  in ext4_writepages()
2752 	ret = mpage_prepare_extent_to_map(&mpd);  in ext4_writepages()
2754 	mpage_release_unused_pages(&mpd, false);  in ext4_writepages()
2756 	ext4_io_submit(&mpd.io_submit);  in ext4_writepages()
2757 	ext4_put_io_end_defer(mpd.io_submit.io_end);  in ext4_writepages()
2758 	mpd.io_submit.io_end = NULL;  in ext4_writepages()
2762 	while (!mpd.scanned_until_end && wbc->nr_to_write > 0) {  in ext4_writepages()
2764 		mpd.io_submit.io_end = ext4_init_io_end(inode, GFP_KERNEL);  in ext4_writepages()
2765 		if (!mpd.io_submit.io_end) {  in ext4_writepages()
2789 			ext4_put_io_end(mpd.io_submit.io_end);  in ext4_writepages()
2790 			mpd.io_submit.io_end = NULL;  in ext4_writepages()
2793 		mpd.do_map = 1;  in ext4_writepages()
2795 		trace_ext4_da_write_pages(inode, mpd.first_page, mpd.wbc);  in ext4_writepages()
2796 		ret = mpage_prepare_extent_to_map(&mpd);  in ext4_writepages()
2797 		if (!ret && mpd.map.m_len)  in ext4_writepages()
2798 			ret = mpage_map_and_submit_extent(handle, &mpd,  in ext4_writepages()
2813 			mpd.do_map = 0;  in ext4_writepages()
2816 		mpage_release_unused_pages(&mpd, give_up_on_write);  in ext4_writepages()
2818 		ext4_io_submit(&mpd.io_submit);  in ext4_writepages()
2828 			ext4_put_io_end_defer(mpd.io_submit.io_end);  in ext4_writepages()
2831 			ext4_put_io_end(mpd.io_submit.io_end);  in ext4_writepages()
2832 		mpd.io_submit.io_end = NULL;  in ext4_writepages()
2852 		mpd.last_page = writeback_index - 1;  in ext4_writepages()
2853 		mpd.first_page = 0;  in ext4_writepages()
2863 		mapping->writeback_index = mpd.first_page;  in ext4_writepages()