38 static int v9fs_fid_readpage(void *data, struct page *page)  in v9fs_fid_readpage()  argument
41 	struct inode *inode = page->mapping->host;  in v9fs_fid_readpage()
42 	struct bio_vec bvec = {.bv_page = page, .bv_len = PAGE_SIZE};  in v9fs_fid_readpage()
48 	BUG_ON(!PageLocked(page));  in v9fs_fid_readpage()
50 	retval = v9fs_readpage_from_fscache(inode, page);  in v9fs_fid_readpage()
56 	retval = p9_client_read(fid, page_offset(page), &to, &err);  in v9fs_fid_readpage()
58 		v9fs_uncache_page(inode, page);  in v9fs_fid_readpage()
63 	zero_user(page, retval, PAGE_SIZE - retval);  in v9fs_fid_readpage()
64 	flush_dcache_page(page);  in v9fs_fid_readpage()
65 	SetPageUptodate(page);  in v9fs_fid_readpage()
67 	v9fs_readpage_to_fscache(inode, page);  in v9fs_fid_readpage()
71 	unlock_page(page);  in v9fs_fid_readpage()
83 static int v9fs_vfs_readpage(struct file *filp, struct page *page)  in v9fs_vfs_readpage()  argument
85 	return v9fs_fid_readpage(filp->private_data, page);  in v9fs_vfs_readpage()
123 static int v9fs_release_page(struct page *page, gfp_t gfp)  in v9fs_release_page()  argument
125 	if (PagePrivate(page))  in v9fs_release_page()
127 	return v9fs_fscache_release_page(page, gfp);  in v9fs_release_page()
137 static void v9fs_invalidate_page(struct page *page, unsigned int offset,  in v9fs_invalidate_page()  argument
145 		v9fs_fscache_invalidate_page(page);  in v9fs_invalidate_page()
148 static int v9fs_vfs_writepage_locked(struct page *page)  in v9fs_vfs_writepage_locked()  argument
150 	struct inode *inode = page->mapping->host;  in v9fs_vfs_writepage_locked()
157 	if (page->index == size >> PAGE_SHIFT)  in v9fs_vfs_writepage_locked()
162 	bvec.bv_page = page;  in v9fs_vfs_writepage_locked()
170 	set_page_writeback(page);  in v9fs_vfs_writepage_locked()
172 	p9_client_write(v9inode->writeback_fid, page_offset(page), &from, &err);  in v9fs_vfs_writepage_locked()
174 	end_page_writeback(page);  in v9fs_vfs_writepage_locked()
178 static int v9fs_vfs_writepage(struct page *page, struct writeback_control *wbc)  in v9fs_vfs_writepage()  argument
182 	p9_debug(P9_DEBUG_VFS, "page %p\n", page);  in v9fs_vfs_writepage()
184 	retval = v9fs_vfs_writepage_locked(page);  in v9fs_vfs_writepage()
187 			redirty_page_for_writepage(wbc, page);  in v9fs_vfs_writepage()
190 			SetPageError(page);  in v9fs_vfs_writepage()
191 			mapping_set_error(page->mapping, retval);  in v9fs_vfs_writepage()
196 	unlock_page(page);  in v9fs_vfs_writepage()
205 static int v9fs_launder_page(struct page *page)  in v9fs_launder_page()  argument
208 	struct inode *inode = page->mapping->host;  in v9fs_launder_page()
210 	v9fs_fscache_wait_on_page_write(inode, page);  in v9fs_launder_page()
211 	if (clear_page_dirty_for_io(page)) {  in v9fs_launder_page()
212 		retval = v9fs_vfs_writepage_locked(page);  in v9fs_launder_page()
257 			    struct page **pagep, void **fsdata)  in v9fs_write_begin()
260 	struct page *page;  in v9fs_write_begin()  local
270 	page = grab_cache_page_write_begin(mapping, index, flags);  in v9fs_write_begin()
271 	if (!page) {  in v9fs_write_begin()
276 	if (PageUptodate(page))  in v9fs_write_begin()
282 	retval = v9fs_fid_readpage(v9inode->writeback_fid, page);  in v9fs_write_begin()
283 	put_page(page);  in v9fs_write_begin()
287 	*pagep = page;  in v9fs_write_begin()
293 			  struct page *page, void *fsdata)  in v9fs_write_end()  argument
296 	struct inode *inode = page->mapping->host;  in v9fs_write_end()
300 	if (!PageUptodate(page)) {  in v9fs_write_end()
305 			SetPageUptodate(page);  in v9fs_write_end()
316 	set_page_dirty(page);  in v9fs_write_end()
318 	unlock_page(page);  in v9fs_write_end()
319 	put_page(page);  in v9fs_write_end()