41 static void gfs2_page_add_databufs(struct gfs2_inode *ip, struct page *page,  in gfs2_page_add_databufs()  argument
44 	struct buffer_head *head = page_buffers(page);  in gfs2_page_add_databufs()
97 static int gfs2_writepage_common(struct page *page,  in gfs2_writepage_common()  argument
100 	struct inode *inode = page->mapping->host;  in gfs2_writepage_common()
113 	if (page->index > end_index || (page->index == end_index && !offset)) {  in gfs2_writepage_common()
114 		page->mapping->a_ops->invalidatepage(page, 0, PAGE_CACHE_SIZE);  in gfs2_writepage_common()
119 	redirty_page_for_writepage(wbc, page);  in gfs2_writepage_common()
121 	unlock_page(page);  in gfs2_writepage_common()
132 static int gfs2_writepage(struct page *page, struct writeback_control *wbc)  in gfs2_writepage()  argument
136 	ret = gfs2_writepage_common(page, wbc);  in gfs2_writepage()
140 	return nobh_writepage(page, gfs2_get_block_noalloc, wbc);  in gfs2_writepage()
154 static int __gfs2_jdata_writepage(struct page *page, struct writeback_control *wbc)  in __gfs2_jdata_writepage()  argument
156 	struct inode *inode = page->mapping->host;  in __gfs2_jdata_writepage()
160 	if (PageChecked(page)) {  in __gfs2_jdata_writepage()
161 		ClearPageChecked(page);  in __gfs2_jdata_writepage()
162 		if (!page_has_buffers(page)) {  in __gfs2_jdata_writepage()
163 			create_empty_buffers(page, inode->i_sb->s_blocksize,  in __gfs2_jdata_writepage()
166 		gfs2_page_add_databufs(ip, page, 0, sdp->sd_vfs->s_blocksize-1);  in __gfs2_jdata_writepage()
168 	return block_write_full_page(page, gfs2_get_block_noalloc, wbc);  in __gfs2_jdata_writepage()
179 static int gfs2_jdata_writepage(struct page *page, struct writeback_control *wbc)  in gfs2_jdata_writepage()  argument
181 	struct inode *inode = page->mapping->host;  in gfs2_jdata_writepage()
186 	if (PageChecked(page)) {  in gfs2_jdata_writepage()
194 	ret = gfs2_writepage_common(page, wbc);  in gfs2_jdata_writepage()
196 		ret = __gfs2_jdata_writepage(page, wbc);  in gfs2_jdata_writepage()
202 	redirty_page_for_writepage(wbc, page);  in gfs2_jdata_writepage()
203 	unlock_page(page);  in gfs2_jdata_writepage()
248 		struct page *page = pvec->pages[i];  in gfs2_write_jdata_pagevec()  local
257 		if (page->index > end) {  in gfs2_write_jdata_pagevec()
266 		*done_index = page->index;  in gfs2_write_jdata_pagevec()
268 		lock_page(page);  in gfs2_write_jdata_pagevec()
270 		if (unlikely(page->mapping != mapping)) {  in gfs2_write_jdata_pagevec()
272 			unlock_page(page);  in gfs2_write_jdata_pagevec()
276 		if (!PageDirty(page)) {  in gfs2_write_jdata_pagevec()
281 		if (PageWriteback(page)) {  in gfs2_write_jdata_pagevec()
283 				wait_on_page_writeback(page);  in gfs2_write_jdata_pagevec()
288 		BUG_ON(PageWriteback(page));  in gfs2_write_jdata_pagevec()
289 		if (!clear_page_dirty_for_io(page))  in gfs2_write_jdata_pagevec()
294 		ret = __gfs2_jdata_writepage(page, wbc);  in gfs2_write_jdata_pagevec()
297 				unlock_page(page);  in gfs2_write_jdata_pagevec()
310 				*done_index = page->index + 1;  in gfs2_write_jdata_pagevec()
448 static int stuffed_readpage(struct gfs2_inode *ip, struct page *page)  in stuffed_readpage()  argument
460 	if (unlikely(page->index)) {  in stuffed_readpage()
461 		zero_user(page, 0, PAGE_CACHE_SIZE);  in stuffed_readpage()
462 		SetPageUptodate(page);  in stuffed_readpage()
470 	kaddr = kmap_atomic(page);  in stuffed_readpage()
476 	flush_dcache_page(page);  in stuffed_readpage()
478 	SetPageUptodate(page);  in stuffed_readpage()
495 static int __gfs2_readpage(void *file, struct page *page)  in __gfs2_readpage()  argument
497 	struct gfs2_inode *ip = GFS2_I(page->mapping->host);  in __gfs2_readpage()
498 	struct gfs2_sbd *sdp = GFS2_SB(page->mapping->host);  in __gfs2_readpage()
502 		error = stuffed_readpage(ip, page);  in __gfs2_readpage()
503 		unlock_page(page);  in __gfs2_readpage()
505 		error = mpage_readpage(page, gfs2_block_map);  in __gfs2_readpage()
524 static int gfs2_readpage(struct file *file, struct page *page)  in gfs2_readpage()  argument
526 	struct address_space *mapping = page->mapping;  in gfs2_readpage()
531 	unlock_page(page);  in gfs2_readpage()
537 	lock_page(page);  in gfs2_readpage()
538 	if (page->mapping == mapping && !PageUptodate(page))  in gfs2_readpage()
539 		error = __gfs2_readpage(file, page);  in gfs2_readpage()
541 		unlock_page(page);  in gfs2_readpage()
546 		lock_page(page);  in gfs2_readpage()
567 	struct page *page;  in gfs2_internal_read()  local
574 		page = read_cache_page(mapping, index, __gfs2_readpage, NULL);  in gfs2_internal_read()
575 		if (IS_ERR(page))  in gfs2_internal_read()
576 			return PTR_ERR(page);  in gfs2_internal_read()
577 		p = kmap_atomic(page);  in gfs2_internal_read()
580 		page_cache_release(page);  in gfs2_internal_read()
641 			    struct page **pagep, void **fsdata)  in gfs2_write_begin()
652 	struct page *page;  in gfs2_write_begin()  local
702 	page = grab_cache_page_write_begin(mapping, index, flags);  in gfs2_write_begin()
703 	*pagep = page;  in gfs2_write_begin()
704 	if (unlikely(!page))  in gfs2_write_begin()
710 			error = gfs2_unstuff_dinode(ip, page);  in gfs2_write_begin()
713 		} else if (!PageUptodate(page)) {  in gfs2_write_begin()
714 			error = stuffed_readpage(ip, page);  in gfs2_write_begin()
720 	error = __block_write_begin(page, from, len, gfs2_block_map);  in gfs2_write_begin()
725 	unlock_page(page);  in gfs2_write_begin()
726 	page_cache_release(page);  in gfs2_write_begin()
807 				  struct page *page)  in gfs2_stuffed_write_end()  argument
817 	kaddr = kmap_atomic(page);  in gfs2_stuffed_write_end()
820 	flush_dcache_page(page);  in gfs2_stuffed_write_end()
823 	if (!PageUptodate(page))  in gfs2_stuffed_write_end()
824 		SetPageUptodate(page);  in gfs2_stuffed_write_end()
825 	unlock_page(page);  in gfs2_stuffed_write_end()
826 	page_cache_release(page);  in gfs2_stuffed_write_end()
869 			  struct page *page, void *fsdata)  in gfs2_write_end()  argument
871 	struct inode *inode = page->mapping->host;  in gfs2_write_end()
886 		unlock_page(page);  in gfs2_write_end()
887 		page_cache_release(page);  in gfs2_write_end()
892 		return gfs2_stuffed_write_end(inode, dibh, pos, len, copied, page);  in gfs2_write_end()
895 		gfs2_page_add_databufs(ip, page, from, to);  in gfs2_write_end()
897 	ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata);  in gfs2_write_end()
931 static int gfs2_set_page_dirty(struct page *page)  in gfs2_set_page_dirty()  argument
933 	SetPageChecked(page);  in gfs2_set_page_dirty()
934 	return __set_page_dirty_buffers(page);  in gfs2_set_page_dirty()
986 static void gfs2_invalidatepage(struct page *page, unsigned int offset,  in gfs2_invalidatepage()  argument
989 	struct gfs2_sbd *sdp = GFS2_SB(page->mapping->host);  in gfs2_invalidatepage()
995 	BUG_ON(!PageLocked(page));  in gfs2_invalidatepage()
997 		ClearPageChecked(page);  in gfs2_invalidatepage()
998 	if (!page_has_buffers(page))  in gfs2_invalidatepage()
1001 	bh = head = page_buffers(page);  in gfs2_invalidatepage()
1013 		try_to_release_page(page, 0);  in gfs2_invalidatepage()
1116 int gfs2_releasepage(struct page *page, gfp_t gfp_mask)  in gfs2_releasepage()  argument
1118 	struct address_space *mapping = page->mapping;  in gfs2_releasepage()
1123 	if (!page_has_buffers(page))  in gfs2_releasepage()
1128 	head = bh = page_buffers(page);  in gfs2_releasepage()
1141 	head = bh = page_buffers(page);  in gfs2_releasepage()
1157 	return try_to_free_buffers(page);  in gfs2_releasepage()