56 static int netfs_single_begin_cache_read(struct netfs_io_request *rreq, struct netfs_inode *ctx)  in netfs_single_begin_cache_read()  argument
58 	return fscache_begin_read_operation(&rreq->cache_resources, netfs_i_cookie(ctx));  in netfs_single_begin_cache_read()
61 static void netfs_single_cache_prepare_read(struct netfs_io_request *rreq,  in netfs_single_cache_prepare_read()  argument
64 	struct netfs_cache_resources *cres = &rreq->cache_resources;  in netfs_single_cache_prepare_read()
70 	subreq->source = cres->ops->prepare_read(subreq, rreq->i_size);  in netfs_single_cache_prepare_read()
75 static void netfs_single_read_cache(struct netfs_io_request *rreq,  in netfs_single_read_cache()  argument
78 	struct netfs_cache_resources *cres = &rreq->cache_resources;  in netfs_single_read_cache()
80 	_enter("R=%08x[%x]", rreq->debug_id, subreq->debug_index);  in netfs_single_read_cache()
90 static int netfs_single_dispatch_read(struct netfs_io_request *rreq)  in netfs_single_dispatch_read()  argument
92 	struct netfs_io_stream *stream = &rreq->io_streams[0];  in netfs_single_dispatch_read()
96 	subreq = netfs_alloc_subrequest(rreq);  in netfs_single_dispatch_read()
102 	subreq->len	= rreq->len;  in netfs_single_dispatch_read()
103 	subreq->io_iter	= rreq->buffer.iter;  in netfs_single_dispatch_read()
107 	spin_lock(&rreq->lock);  in netfs_single_dispatch_read()
112 	spin_unlock(&rreq->lock);  in netfs_single_dispatch_read()
114 	netfs_single_cache_prepare_read(rreq, subreq);  in netfs_single_dispatch_read()
118 		if (rreq->netfs_ops->prepare_read) {  in netfs_single_dispatch_read()
119 			ret = rreq->netfs_ops->prepare_read(subreq);  in netfs_single_dispatch_read()
124 		rreq->netfs_ops->issue_read(subreq);  in netfs_single_dispatch_read()
125 		rreq->submitted += subreq->len;  in netfs_single_dispatch_read()
129 		netfs_single_read_cache(rreq, subreq);  in netfs_single_dispatch_read()
130 		rreq->submitted += subreq->len;  in netfs_single_dispatch_read()
141 	set_bit(NETFS_RREQ_ALL_QUEUED, &rreq->flags);  in netfs_single_dispatch_read()
167 	struct netfs_io_request *rreq;  in netfs_read_single()  local
171 	rreq = netfs_alloc_request(inode->i_mapping, file, 0, iov_iter_count(iter),  in netfs_read_single()
173 	if (IS_ERR(rreq))  in netfs_read_single()
174 		return PTR_ERR(rreq);  in netfs_read_single()
176 	ret = netfs_single_begin_cache_read(rreq, ictx);  in netfs_read_single()
181 	trace_netfs_read(rreq, 0, rreq->len, netfs_read_trace_read_single);  in netfs_read_single()
183 	rreq->buffer.iter = *iter;  in netfs_read_single()
184 	netfs_single_dispatch_read(rreq);  in netfs_read_single()
186 	ret = netfs_wait_for_read(rreq);  in netfs_read_single()
187 	netfs_put_request(rreq, netfs_rreq_trace_put_return);  in netfs_read_single()
191 	netfs_put_failed_request(rreq);  in netfs_read_single()