52 static int v9fs_fid_readpage(struct p9_fid *fid, struct page *page)  in v9fs_fid_readpage()  argument
54 	struct inode *inode = page->mapping->host;  in v9fs_fid_readpage()
55 	struct bio_vec bvec = {.bv_page = page, .bv_len = PAGE_SIZE};  in v9fs_fid_readpage()
61 	BUG_ON(!PageLocked(page));  in v9fs_fid_readpage()
63 	retval = v9fs_readpage_from_fscache(inode, page);  in v9fs_fid_readpage()
69 	retval = p9_client_read(fid, page_offset(page), &to, &err);  in v9fs_fid_readpage()
71 		v9fs_uncache_page(inode, page);  in v9fs_fid_readpage()
76 	zero_user(page, retval, PAGE_SIZE - retval);  in v9fs_fid_readpage()
77 	flush_dcache_page(page);  in v9fs_fid_readpage()
78 	SetPageUptodate(page);  in v9fs_fid_readpage()
80 	v9fs_readpage_to_fscache(inode, page);  in v9fs_fid_readpage()
84 	unlock_page(page);  in v9fs_fid_readpage()
96 static int v9fs_vfs_readpage(struct file *filp, struct page *page)  in v9fs_vfs_readpage()  argument
98 	return v9fs_fid_readpage(filp->private_data, page);  in v9fs_vfs_readpage()
135 static int v9fs_release_page(struct page *page, gfp_t gfp)  in v9fs_release_page()  argument
137 	if (PagePrivate(page))  in v9fs_release_page()
139 	return v9fs_fscache_release_page(page, gfp);  in v9fs_release_page()
149 static void v9fs_invalidate_page(struct page *page, unsigned int offset,  in v9fs_invalidate_page()  argument
157 		v9fs_fscache_invalidate_page(page);  in v9fs_invalidate_page()
160 static int v9fs_vfs_writepage_locked(struct page *page)  in v9fs_vfs_writepage_locked()  argument
162 	struct inode *inode = page->mapping->host;  in v9fs_vfs_writepage_locked()
169 	if (page->index == size >> PAGE_CACHE_SHIFT)  in v9fs_vfs_writepage_locked()
174 	bvec.bv_page = page;  in v9fs_vfs_writepage_locked()
182 	set_page_writeback(page);  in v9fs_vfs_writepage_locked()
184 	p9_client_write(v9inode->writeback_fid, page_offset(page), &from, &err);  in v9fs_vfs_writepage_locked()
186 	end_page_writeback(page);  in v9fs_vfs_writepage_locked()
190 static int v9fs_vfs_writepage(struct page *page, struct writeback_control *wbc)  in v9fs_vfs_writepage()  argument
194 	p9_debug(P9_DEBUG_VFS, "page %p\n", page);  in v9fs_vfs_writepage()
196 	retval = v9fs_vfs_writepage_locked(page);  in v9fs_vfs_writepage()
199 			redirty_page_for_writepage(wbc, page);  in v9fs_vfs_writepage()
202 			SetPageError(page);  in v9fs_vfs_writepage()
203 			mapping_set_error(page->mapping, retval);  in v9fs_vfs_writepage()
208 	unlock_page(page);  in v9fs_vfs_writepage()
217 static int v9fs_launder_page(struct page *page)  in v9fs_launder_page()  argument
220 	struct inode *inode = page->mapping->host;  in v9fs_launder_page()
222 	v9fs_fscache_wait_on_page_write(inode, page);  in v9fs_launder_page()
223 	if (clear_page_dirty_for_io(page)) {  in v9fs_launder_page()
224 		retval = v9fs_vfs_writepage_locked(page);  in v9fs_launder_page()
269 			    struct page **pagep, void **fsdata)  in v9fs_write_begin()
272 	struct page *page;  in v9fs_write_begin()  local
282 	page = grab_cache_page_write_begin(mapping, index, flags);  in v9fs_write_begin()
283 	if (!page) {  in v9fs_write_begin()
288 	if (PageUptodate(page))  in v9fs_write_begin()
294 	retval = v9fs_fid_readpage(v9inode->writeback_fid, page);  in v9fs_write_begin()
295 	page_cache_release(page);  in v9fs_write_begin()
299 	*pagep = page;  in v9fs_write_begin()
305 			  struct page *page, void *fsdata)  in v9fs_write_end()  argument
308 	struct inode *inode = page->mapping->host;  in v9fs_write_end()
318 		zero_user(page, from + copied, len - copied);  in v9fs_write_end()
319 		flush_dcache_page(page);  in v9fs_write_end()
322 	if (!PageUptodate(page))  in v9fs_write_end()
323 		SetPageUptodate(page);  in v9fs_write_end()
332 	set_page_dirty(page);  in v9fs_write_end()
333 	unlock_page(page);  in v9fs_write_end()
334 	page_cache_release(page);  in v9fs_write_end()