1547 static void mpage_release_unused_pages(struct mpage_da_data *mpd,  in mpage_release_unused_pages()  argument
1553 	struct inode *inode = mpd->inode;  in mpage_release_unused_pages()
1557 	if (mpd->first_page >= mpd->next_page)  in mpage_release_unused_pages()
1560 	mpd->scanned_until_end = 0;  in mpage_release_unused_pages()
1561 	index = mpd->first_page;  in mpage_release_unused_pages()
1562 	end   = mpd->next_page - 1;  in mpage_release_unused_pages()
2065 static int mpage_submit_page(struct mpage_da_data *mpd, struct page *page)  in mpage_submit_page()  argument
2071 	BUG_ON(page->index != mpd->first_page);  in mpage_submit_page()
2086 	size = i_size_read(mpd->inode);  in mpage_submit_page()
2088 	    !ext4_verity_in_progress(mpd->inode))  in mpage_submit_page()
2092 	err = ext4_bio_write_page(&mpd->io_submit, page, len, mpd->wbc, false);  in mpage_submit_page()
2094 		mpd->wbc->nr_to_write--;  in mpage_submit_page()
2095 	mpd->first_page++;  in mpage_submit_page()
2123 static bool mpage_add_bh_to_extent(struct mpage_da_data *mpd, ext4_lblk_t lblk,  in mpage_add_bh_to_extent()  argument
2126 	struct ext4_map_blocks *map = &mpd->map;  in mpage_add_bh_to_extent()
2140 		if (!mpd->do_map)  in mpage_add_bh_to_extent()
2177 static int mpage_process_page_bufs(struct mpage_da_data *mpd,  in mpage_process_page_bufs()  argument
2182 	struct inode *inode = mpd->inode;  in mpage_process_page_bufs()
2193 		if (lblk >= blocks || !mpage_add_bh_to_extent(mpd, lblk, bh)) {  in mpage_process_page_bufs()
2195 			if (mpd->map.m_len)  in mpage_process_page_bufs()
2198 			if (!mpd->do_map)  in mpage_process_page_bufs()
2205 	if (mpd->map.m_len == 0) {  in mpage_process_page_bufs()
2206 		err = mpage_submit_page(mpd, head->b_page);  in mpage_process_page_bufs()
2211 		mpd->scanned_until_end = 1;  in mpage_process_page_bufs()
2232 static int mpage_process_page(struct mpage_da_data *mpd, struct page *page,  in mpage_process_page()  argument
2237 	ext4_io_end_t *io_end = mpd->io_submit.io_end;  in mpage_process_page()
2241 	int blkbits = mpd->inode->i_blkbits;  in mpage_process_page()
2247 		if (lblk < mpd->map.m_lblk)  in mpage_process_page()
2249 		if (lblk >= mpd->map.m_lblk + mpd->map.m_len) {  in mpage_process_page()
2254 			mpd->map.m_len = 0;  in mpage_process_page()
2255 			mpd->map.m_flags = 0;  in mpage_process_page()
2259 			err = mpage_process_page_bufs(mpd, head, bh, lblk);  in mpage_process_page()
2262 			if (!err && mpd->map.m_len && mpd->map.m_lblk > lblk) {  in mpage_process_page()
2268 				io_end_vec->offset = (loff_t)mpd->map.m_lblk << blkbits;  in mpage_process_page()
2304 static int mpage_map_and_submit_buffers(struct mpage_da_data *mpd)  in mpage_map_and_submit_buffers()  argument
2308 	struct inode *inode = mpd->inode;  in mpage_map_and_submit_buffers()
2316 	start = mpd->map.m_lblk >> bpp_bits;  in mpage_map_and_submit_buffers()
2317 	end = (mpd->map.m_lblk + mpd->map.m_len - 1) >> bpp_bits;  in mpage_map_and_submit_buffers()
2319 	pblock = mpd->map.m_pblk;  in mpage_map_and_submit_buffers()
2330 			err = mpage_process_page(mpd, page, &lblk, &pblock,  in mpage_map_and_submit_buffers()
2340 			err = mpage_submit_page(mpd, page);  in mpage_map_and_submit_buffers()
2347 	mpd->map.m_len = 0;  in mpage_map_and_submit_buffers()
2348 	mpd->map.m_flags = 0;  in mpage_map_and_submit_buffers()
2355 static int mpage_map_one_extent(handle_t *handle, struct mpage_da_data *mpd)  in mpage_map_one_extent()  argument
2357 	struct inode *inode = mpd->inode;  in mpage_map_one_extent()
2358 	struct ext4_map_blocks *map = &mpd->map;  in mpage_map_one_extent()
2391 		if (!mpd->io_submit.io_end->handle &&  in mpage_map_one_extent()
2393 			mpd->io_submit.io_end->handle = handle->h_rsv_handle;  in mpage_map_one_extent()
2396 		ext4_set_io_unwritten_flag(inode, mpd->io_submit.io_end);  in mpage_map_one_extent()
2424 				       struct mpage_da_data *mpd,  in mpage_map_and_submit_extent()  argument
2427 	struct inode *inode = mpd->inode;  in mpage_map_and_submit_extent()
2428 	struct ext4_map_blocks *map = &mpd->map;  in mpage_map_and_submit_extent()
2432 	ext4_io_end_t *io_end = mpd->io_submit.io_end;  in mpage_map_and_submit_extent()
2440 		err = mpage_map_one_extent(handle, mpd);  in mpage_map_and_submit_extent()
2479 		err = mpage_map_and_submit_buffers(mpd);  in mpage_map_and_submit_extent()
2489 	disksize = ((loff_t)mpd->first_page) << PAGE_SHIFT;  in mpage_map_and_submit_extent()
2546 static int mpage_prepare_extent_to_map(struct mpage_da_data *mpd)  in mpage_prepare_extent_to_map()  argument
2548 	struct address_space *mapping = mpd->inode->i_mapping;  in mpage_prepare_extent_to_map()
2551 	long left = mpd->wbc->nr_to_write;  in mpage_prepare_extent_to_map()
2552 	pgoff_t index = mpd->first_page;  in mpage_prepare_extent_to_map()
2553 	pgoff_t end = mpd->last_page;  in mpage_prepare_extent_to_map()
2556 	int blkbits = mpd->inode->i_blkbits;  in mpage_prepare_extent_to_map()
2560 	if (mpd->wbc->sync_mode == WB_SYNC_ALL || mpd->wbc->tagged_writepages)  in mpage_prepare_extent_to_map()
2566 	mpd->map.m_len = 0;  in mpage_prepare_extent_to_map()
2567 	mpd->next_page = index;  in mpage_prepare_extent_to_map()
2585 			if (mpd->wbc->sync_mode == WB_SYNC_NONE && left <= 0)  in mpage_prepare_extent_to_map()
2589 			if (mpd->map.m_len > 0 && mpd->next_page != page->index)  in mpage_prepare_extent_to_map()
2602 			     (mpd->wbc->sync_mode == WB_SYNC_NONE)) ||  in mpage_prepare_extent_to_map()
2611 			if (mpd->map.m_len == 0)  in mpage_prepare_extent_to_map()
2612 				mpd->first_page = page->index;  in mpage_prepare_extent_to_map()
2613 			mpd->next_page = page->index + 1;  in mpage_prepare_extent_to_map()
2618 			err = mpage_process_page_bufs(mpd, head, head, lblk);  in mpage_prepare_extent_to_map()
2627 	mpd->scanned_until_end = 1;  in mpage_prepare_extent_to_map()
2642 	struct mpage_da_data mpd;  in ext4_writepages()  local
2718 		mpd.first_page = writeback_index;  in ext4_writepages()
2719 		mpd.last_page = -1;  in ext4_writepages()
2721 		mpd.first_page = wbc->range_start >> PAGE_SHIFT;  in ext4_writepages()
2722 		mpd.last_page = wbc->range_end >> PAGE_SHIFT;  in ext4_writepages()
2725 	mpd.inode = inode;  in ext4_writepages()
2726 	mpd.wbc = wbc;  in ext4_writepages()
2727 	ext4_io_submit_init(&mpd.io_submit, wbc);  in ext4_writepages()
2730 		tag_pages_for_writeback(mapping, mpd.first_page, mpd.last_page);  in ext4_writepages()
2739 	mpd.do_map = 0;  in ext4_writepages()
2740 	mpd.scanned_until_end = 0;  in ext4_writepages()
2741 	mpd.io_submit.io_end = ext4_init_io_end(inode, GFP_KERNEL);  in ext4_writepages()
2742 	if (!mpd.io_submit.io_end) {  in ext4_writepages()
2746 	ret = mpage_prepare_extent_to_map(&mpd);  in ext4_writepages()
2748 	mpage_release_unused_pages(&mpd, false);  in ext4_writepages()
2750 	ext4_io_submit(&mpd.io_submit);  in ext4_writepages()
2751 	ext4_put_io_end_defer(mpd.io_submit.io_end);  in ext4_writepages()
2752 	mpd.io_submit.io_end = NULL;  in ext4_writepages()
2756 	while (!mpd.scanned_until_end && wbc->nr_to_write > 0) {  in ext4_writepages()
2758 		mpd.io_submit.io_end = ext4_init_io_end(inode, GFP_KERNEL);  in ext4_writepages()
2759 		if (!mpd.io_submit.io_end) {  in ext4_writepages()
2783 			ext4_put_io_end(mpd.io_submit.io_end);  in ext4_writepages()
2784 			mpd.io_submit.io_end = NULL;  in ext4_writepages()
2787 		mpd.do_map = 1;  in ext4_writepages()
2789 		trace_ext4_da_write_pages(inode, mpd.first_page, mpd.wbc);  in ext4_writepages()
2790 		ret = mpage_prepare_extent_to_map(&mpd);  in ext4_writepages()
2791 		if (!ret && mpd.map.m_len)  in ext4_writepages()
2792 			ret = mpage_map_and_submit_extent(handle, &mpd,  in ext4_writepages()
2807 			mpd.do_map = 0;  in ext4_writepages()
2810 		mpage_release_unused_pages(&mpd, give_up_on_write);  in ext4_writepages()
2812 		ext4_io_submit(&mpd.io_submit);  in ext4_writepages()
2822 			ext4_put_io_end_defer(mpd.io_submit.io_end);  in ext4_writepages()
2825 			ext4_put_io_end(mpd.io_submit.io_end);  in ext4_writepages()
2826 		mpd.io_submit.io_end = NULL;  in ext4_writepages()
2846 		mpd.last_page = writeback_index - 1;  in ext4_writepages()
2847 		mpd.first_page = 0;  in ext4_writepages()
2857 		mapping->writeback_index = mpd.first_page;  in ext4_writepages()