1440 static void mpage_release_unused_pages(struct mpage_da_data *mpd,  in mpage_release_unused_pages()  argument
1446 	struct inode *inode = mpd->inode;  in mpage_release_unused_pages()
1450 	if (mpd->first_page >= mpd->next_page)  in mpage_release_unused_pages()
1453 	index = mpd->first_page;  in mpage_release_unused_pages()
1454 	end   = mpd->next_page - 1;  in mpage_release_unused_pages()
1896 static int mpage_submit_page(struct mpage_da_data *mpd, struct page *page)  in mpage_submit_page()  argument
1899 	loff_t size = i_size_read(mpd->inode);  in mpage_submit_page()
1902 	BUG_ON(page->index != mpd->first_page);  in mpage_submit_page()
1908 	err = ext4_bio_write_page(&mpd->io_submit, page, len, mpd->wbc, false);  in mpage_submit_page()
1910 		mpd->wbc->nr_to_write--;  in mpage_submit_page()
1911 	mpd->first_page++;  in mpage_submit_page()
1939 static bool mpage_add_bh_to_extent(struct mpage_da_data *mpd, ext4_lblk_t lblk,  in mpage_add_bh_to_extent()  argument
1942 	struct ext4_map_blocks *map = &mpd->map;  in mpage_add_bh_to_extent()
1990 static int mpage_process_page_bufs(struct mpage_da_data *mpd,  in mpage_process_page_bufs()  argument
1995 	struct inode *inode = mpd->inode;  in mpage_process_page_bufs()
2003 		if (lblk >= blocks || !mpage_add_bh_to_extent(mpd, lblk, bh)) {  in mpage_process_page_bufs()
2005 			if (mpd->map.m_len)  in mpage_process_page_bufs()
2012 	if (mpd->map.m_len == 0) {  in mpage_process_page_bufs()
2013 		err = mpage_submit_page(mpd, head->b_page);  in mpage_process_page_bufs()
2034 static int mpage_map_and_submit_buffers(struct mpage_da_data *mpd)  in mpage_map_and_submit_buffers()  argument
2038 	struct inode *inode = mpd->inode;  in mpage_map_and_submit_buffers()
2046 	start = mpd->map.m_lblk >> bpp_bits;  in mpage_map_and_submit_buffers()
2047 	end = (mpd->map.m_lblk + mpd->map.m_len - 1) >> bpp_bits;  in mpage_map_and_submit_buffers()
2049 	pblock = mpd->map.m_pblk;  in mpage_map_and_submit_buffers()
2066 				if (lblk < mpd->map.m_lblk)  in mpage_map_and_submit_buffers()
2068 				if (lblk >= mpd->map.m_lblk + mpd->map.m_len) {  in mpage_map_and_submit_buffers()
2073 					mpd->map.m_len = 0;  in mpage_map_and_submit_buffers()
2074 					mpd->map.m_flags = 0;  in mpage_map_and_submit_buffers()
2082 					err = mpage_process_page_bufs(mpd, head,  in mpage_map_and_submit_buffers()
2101 			mpd->io_submit.io_end->size += PAGE_CACHE_SIZE;  in mpage_map_and_submit_buffers()
2103 			err = mpage_submit_page(mpd, page);  in mpage_map_and_submit_buffers()
2113 	mpd->map.m_len = 0;  in mpage_map_and_submit_buffers()
2114 	mpd->map.m_flags = 0;  in mpage_map_and_submit_buffers()
2118 static int mpage_map_one_extent(handle_t *handle, struct mpage_da_data *mpd)  in mpage_map_one_extent()  argument
2120 	struct inode *inode = mpd->inode;  in mpage_map_one_extent()
2121 	struct ext4_map_blocks *map = &mpd->map;  in mpage_map_one_extent()
2153 		if (!mpd->io_submit.io_end->handle &&  in mpage_map_one_extent()
2155 			mpd->io_submit.io_end->handle = handle->h_rsv_handle;  in mpage_map_one_extent()
2158 		ext4_set_io_unwritten_flag(inode, mpd->io_submit.io_end);  in mpage_map_one_extent()
2193 				       struct mpage_da_data *mpd,  in mpage_map_and_submit_extent()  argument
2196 	struct inode *inode = mpd->inode;  in mpage_map_and_submit_extent()
2197 	struct ext4_map_blocks *map = &mpd->map;  in mpage_map_and_submit_extent()
2202 	mpd->io_submit.io_end->offset =  in mpage_map_and_submit_extent()
2205 		err = mpage_map_one_extent(handle, mpd);  in mpage_map_and_submit_extent()
2243 		err = mpage_map_and_submit_buffers(mpd);  in mpage_map_and_submit_extent()
2253 	disksize = ((loff_t)mpd->first_page) << PAGE_CACHE_SHIFT;  in mpage_map_and_submit_extent()
2309 static int mpage_prepare_extent_to_map(struct mpage_da_data *mpd)  in mpage_prepare_extent_to_map()  argument
2311 	struct address_space *mapping = mpd->inode->i_mapping;  in mpage_prepare_extent_to_map()
2314 	long left = mpd->wbc->nr_to_write;  in mpage_prepare_extent_to_map()
2315 	pgoff_t index = mpd->first_page;  in mpage_prepare_extent_to_map()
2316 	pgoff_t end = mpd->last_page;  in mpage_prepare_extent_to_map()
2319 	int blkbits = mpd->inode->i_blkbits;  in mpage_prepare_extent_to_map()
2323 	if (mpd->wbc->sync_mode == WB_SYNC_ALL || mpd->wbc->tagged_writepages)  in mpage_prepare_extent_to_map()
2329 	mpd->map.m_len = 0;  in mpage_prepare_extent_to_map()
2330 	mpd->next_page = index;  in mpage_prepare_extent_to_map()
2358 			if (mpd->wbc->sync_mode == WB_SYNC_NONE && left <= 0)  in mpage_prepare_extent_to_map()
2362 			if (mpd->map.m_len > 0 && mpd->next_page != page->index)  in mpage_prepare_extent_to_map()
2375 			     (mpd->wbc->sync_mode == WB_SYNC_NONE)) ||  in mpage_prepare_extent_to_map()
2384 			if (mpd->map.m_len == 0)  in mpage_prepare_extent_to_map()
2385 				mpd->first_page = page->index;  in mpage_prepare_extent_to_map()
2386 			mpd->next_page = page->index + 1;  in mpage_prepare_extent_to_map()
2391 			err = mpage_process_page_bufs(mpd, head, head, lblk);  in mpage_prepare_extent_to_map()
2423 	struct mpage_da_data mpd;  in ext4_writepages()  local
2498 		mpd.first_page = writeback_index;  in ext4_writepages()
2499 		mpd.last_page = -1;  in ext4_writepages()
2501 		mpd.first_page = wbc->range_start >> PAGE_CACHE_SHIFT;  in ext4_writepages()
2502 		mpd.last_page = wbc->range_end >> PAGE_CACHE_SHIFT;  in ext4_writepages()
2505 	mpd.inode = inode;  in ext4_writepages()
2506 	mpd.wbc = wbc;  in ext4_writepages()
2507 	ext4_io_submit_init(&mpd.io_submit, wbc);  in ext4_writepages()
2510 		tag_pages_for_writeback(mapping, mpd.first_page, mpd.last_page);  in ext4_writepages()
2513 	while (!done && mpd.first_page <= mpd.last_page) {  in ext4_writepages()
2515 		mpd.io_submit.io_end = ext4_init_io_end(inode, GFP_KERNEL);  in ext4_writepages()
2516 		if (!mpd.io_submit.io_end) {  in ext4_writepages()
2540 			ext4_put_io_end(mpd.io_submit.io_end);  in ext4_writepages()
2544 		trace_ext4_da_write_pages(inode, mpd.first_page, mpd.wbc);  in ext4_writepages()
2545 		ret = mpage_prepare_extent_to_map(&mpd);  in ext4_writepages()
2547 			if (mpd.map.m_len)  in ext4_writepages()
2548 				ret = mpage_map_and_submit_extent(handle, &mpd,  in ext4_writepages()
2562 		ext4_io_submit(&mpd.io_submit);  in ext4_writepages()
2564 		mpage_release_unused_pages(&mpd, give_up_on_write);  in ext4_writepages()
2566 		ext4_put_io_end(mpd.io_submit.io_end);  in ext4_writepages()
2585 		mpd.last_page = writeback_index - 1;  in ext4_writepages()
2586 		mpd.first_page = 0;  in ext4_writepages()
2596 		mapping->writeback_index = mpd.first_page;  in ext4_writepages()