75 	struct nfs_page		*req;  in nfs_create_request()  local
85 			req = nfs_page_alloc();  in nfs_create_request()
86 			if (req != NULL)  in nfs_create_request()
105 	req->wb_page    = page;  in nfs_create_request()
107 	req->wb_offset  = offset;  in nfs_create_request()
108 	req->wb_bytes   = count;  in nfs_create_request()
111 		req->wb_cred = get_rpccred(cred);  in nfs_create_request()
112 	req->wb_inode   = inode;  in nfs_create_request()
113 	req->wb_count   = 1;  in nfs_create_request()
115 	return req;  in nfs_create_request()
125 void nfs_clear_request(struct nfs_page *req)  in nfs_clear_request()  argument
128 	if (req->wb_file) {  in nfs_clear_request()
129 		fput(req->wb_file);  in nfs_clear_request()
130 		req->wb_file = NULL;  in nfs_clear_request()
132 	if (req->wb_cred) {  in nfs_clear_request()
133 		put_rpccred(req->wb_cred);  in nfs_clear_request()
134 		req->wb_cred = NULL;  in nfs_clear_request()
136 	if (req->wb_page) {  in nfs_clear_request()
137 		atomic_dec(&NFS_REQUESTLIST(req->wb_inode)->nr_requests);  in nfs_clear_request()
139 		BUG_ON(atomic_read(&NFS_REQUESTLIST(req->wb_inode)->nr_requests) < 0);  in nfs_clear_request()
141 		page_cache_release(req->wb_page);  in nfs_clear_request()
142 		req->wb_page = NULL;  in nfs_clear_request()
154 nfs_release_request(struct nfs_page *req)  in nfs_release_request()  argument
157 	if (--req->wb_count) {  in nfs_release_request()
161 	__nfs_del_lru(req);  in nfs_release_request()
165 	BUG_ON(!list_empty(&req->wb_list));  in nfs_release_request()
166 	BUG_ON(!list_empty(&req->wb_hash));  in nfs_release_request()
167 	BUG_ON(NFS_WBACK_BUSY(req));  in nfs_release_request()
171 	nfs_clear_request(req);  in nfs_release_request()
172 	nfs_page_free(req);  in nfs_release_request()
186 nfs_list_add_request(struct nfs_page *req, struct list_head *head)  in nfs_list_add_request()  argument
189 	unsigned long pg_idx = page_index(req->wb_page);  in nfs_list_add_request()
192 	if (!list_empty(&req->wb_list)) {  in nfs_list_add_request()
202 	list_add(&req->wb_list, pos);  in nfs_list_add_request()
203 	req->wb_list_head = head;  in nfs_list_add_request()
214 nfs_wait_on_request(struct nfs_page *req)  in nfs_wait_on_request()  argument
216 	struct inode	*inode = req->wb_inode;  in nfs_wait_on_request()
219 	if (!NFS_WBACK_BUSY(req))  in nfs_wait_on_request()
221 	return nfs_wait_event(clnt, req->wb_wait, !NFS_WBACK_BUSY(req));  in nfs_wait_on_request()
238 	struct nfs_page		*req = NULL;  in nfs_coalesce_requests()  local
242 		struct nfs_page	*prev = req;  in nfs_coalesce_requests()
244 		req = nfs_list_entry(head->next);  in nfs_coalesce_requests()
246 			if (req->wb_cred != prev->wb_cred)  in nfs_coalesce_requests()
248 			if (page_index(req->wb_page) != page_index(prev->wb_page)+1)  in nfs_coalesce_requests()
251 			if (req->wb_offset != 0)  in nfs_coalesce_requests()
254 		nfs_list_remove_request(req);  in nfs_coalesce_requests()
255 		nfs_list_add_request(req, dst);  in nfs_coalesce_requests()
257 		if (req->wb_offset + req->wb_bytes != PAGE_CACHE_SIZE)  in nfs_coalesce_requests()
276 nfs_scan_forward(struct nfs_page *req, struct list_head *dst, int nmax)  in nfs_scan_forward()  argument
278 	struct nfs_server *server = NFS_SERVER(req->wb_inode);  in nfs_scan_forward()
279 	struct list_head *pos, *head = req->wb_list_head;  in nfs_scan_forward()
280 	struct rpc_cred *cred = req->wb_cred;  in nfs_scan_forward()
281 	unsigned long idx = page_index(req->wb_page) + 1;  in nfs_scan_forward()
284 	for (pos = req->wb_list.next; nfs_lock_request(req); pos = pos->next) {  in nfs_scan_forward()
285 		nfs_list_remove_request(req);  in nfs_scan_forward()
286 		nfs_list_add_request(req, dst);  in nfs_scan_forward()
287 		__nfs_del_lru(req);  in nfs_scan_forward()
288 		__nfs_add_lru(&server->lru_busy, req);  in nfs_scan_forward()
294 		if (req->wb_offset + req->wb_bytes != PAGE_CACHE_SIZE)  in nfs_scan_forward()
296 		req = nfs_list_entry(pos);  in nfs_scan_forward()
297 		if (page_index(req->wb_page) != idx++)  in nfs_scan_forward()
299 		if (req->wb_offset != 0)  in nfs_scan_forward()
301 		if (req->wb_cred != cred)  in nfs_scan_forward()
321 	struct nfs_page *req;  in nfs_scan_lru()  local
325 		req = nfs_lru_entry(pos);  in nfs_scan_lru()
326 		npages = nfs_scan_forward(req, dst, nmax);  in nfs_scan_lru()
349 	struct nfs_page *req;  in nfs_scan_lru_timeout()  local
353 		req = nfs_lru_entry(pos);  in nfs_scan_lru_timeout()
354 		if (time_after(req->wb_timeout, jiffies))  in nfs_scan_lru_timeout()
356 		npages = nfs_scan_forward(req, dst, nmax);  in nfs_scan_lru_timeout()
381 	struct nfs_page		*req;  in nfs_scan_list()  local
394 		req = nfs_list_entry(pos);  in nfs_scan_list()
396 		pg_idx = page_index(req->wb_page);  in nfs_scan_list()
402 		if (!nfs_lock_request(req))  in nfs_scan_list()
404 		nfs_list_remove_request(req);  in nfs_scan_list()
405 		nfs_list_add_request(req, dst);  in nfs_scan_list()
406 		__nfs_del_lru(req);  in nfs_scan_list()
407 		__nfs_add_lru(&NFS_SERVER(req->wb_inode)->lru_busy, req);  in nfs_scan_list()
429 	struct nfs_page *req = NULL;  in nfs_try_to_free_pages()  local
433 		if (req) {  in nfs_try_to_free_pages()
434 			int status = nfs_wait_on_request(req);  in nfs_try_to_free_pages()
435 			nfs_release_request(req);  in nfs_try_to_free_pages()
438 			req = NULL;  in nfs_try_to_free_pages()
446 			req = nfs_lru_entry(server->lru_busy.next);  in nfs_try_to_free_pages()
447 			req->wb_count++;  in nfs_try_to_free_pages()
448 			__nfs_del_lru(req);  in nfs_try_to_free_pages()