2 * Transfer data over the net.
9 #include <netinet/in.h>
10 #include <arpa/inet.h>
18 struct io_u *last_io_u;
21 static int fio_netio_getevents(struct thread_data *td, int fio_unused min,
22 int max, struct timespec fio_unused *t)
27 * we can only have one finished io_u for sync io, since the depth
30 if (list_empty(&td->io_u_busylist))
36 static struct io_u *fio_netio_event(struct thread_data *td, int event)
38 struct net_data *nd = td->io_ops->data;
45 static int fio_netio_prep(struct thread_data *td, struct io_u *io_u)
47 struct net_data *nd = td->io_ops->data;
48 struct fio_file *f = io_u->file;
51 * Make sure we don't see spurious reads to a receiver, and vice versa
53 if ((nd->send_to_net && io_u->ddir == DDIR_READ) ||
54 (!nd->send_to_net && io_u->ddir == DDIR_WRITE)) {
56 td_verror(td, EINVAL);
60 if (io_u->ddir == DDIR_SYNC)
62 if (io_u->offset == f->last_completed_pos)
66 * If offset is different from last end position, it's a seek.
67 * As network io is purely sequential, we don't allow seeks.
69 td_verror(td, EINVAL);
73 static int fio_netio_queue(struct thread_data *td, struct io_u *io_u)
75 struct net_data *nd = td->io_ops->data;
76 struct fio_file *f = io_u->file;
79 if (io_u->ddir == DDIR_WRITE) {
81 * if we are going to write more, set MSG_MORE
83 if (td->this_io_bytes[DDIR_WRITE] + io_u->xfer_buflen <
87 ret = send(f->fd, io_u->xfer_buf, io_u->xfer_buflen, flags);
88 } else if (io_u->ddir == DDIR_READ) {
90 ret = recv(f->fd, io_u->xfer_buf, io_u->xfer_buflen, flags);
92 ret = 0; /* must be a SYNC */
94 if (ret != (int) io_u->xfer_buflen) {
96 io_u->resid = io_u->xfer_buflen - ret;
104 nd->last_io_u = io_u;
109 static int fio_netio_setup_connect(struct thread_data *td, const char *host,
112 struct sockaddr_in addr;
116 memset(&addr, 0, sizeof(addr));
117 addr.sin_family = AF_INET;
118 addr.sin_port = htons(port);
120 if (inet_aton(host, &addr.sin_addr) != 1) {
121 struct hostent *hent;
123 hent = gethostbyname(host);
125 td_verror(td, errno);
129 memcpy(&addr.sin_addr, hent->h_addr, 4);
132 for_each_file(td, f, i) {
133 f->fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
135 td_verror(td, errno);
139 if (connect(f->fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
140 td_verror(td, errno);
149 static int fio_netio_setup_listen(struct thread_data *td, unsigned short port)
151 struct sockaddr_in addr;
156 fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
158 td_verror(td, errno);
163 if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0) {
164 td_verror(td, errno);
168 if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)) < 0) {
169 td_verror(td, errno);
174 memset(&addr, 0, sizeof(addr));
175 addr.sin_family = AF_INET;
176 addr.sin_addr.s_addr = htonl(INADDR_ANY);
177 addr.sin_port = htons(port);
179 if (bind(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
180 td_verror(td, errno);
183 if (listen(fd, 1) < 0) {
184 td_verror(td, errno);
188 fprintf(f_out, "fio: waiting for %u connections\n", td->nr_files);
190 socklen = sizeof(addr);
191 for_each_file(td, f, i) {
192 f->fd = accept(fd, (struct sockaddr *) &addr, &socklen);
194 td_verror(td, errno);
202 static int fio_netio_setup(struct thread_data *td)
204 char host[64], buf[128];
211 if (!td->total_file_size) {
212 log_err("fio: need size= set\n");
217 * work around for late init call
219 if (td->io_ops->init(td))
222 nd = td->io_ops->data;
225 log_err("fio: network connections must be read OR write\n");
229 strcpy(buf, td->filename);
231 sep = strchr(buf, ':');
233 log_err("fio: bad network host:port <<%s>>\n", td->filename);
242 if (td->ddir == DDIR_READ) {
244 ret = fio_netio_setup_listen(td, port);
247 ret = fio_netio_setup_connect(td, host, port);
253 td->io_size = td->total_file_size;
254 td->total_io_size = td->io_size;
256 for_each_file(td, f, i) {
257 f->file_size = td->total_file_size / td->nr_files;
258 f->real_file_size = f->file_size;
264 static void fio_netio_cleanup(struct thread_data *td)
266 if (td->io_ops->data) {
267 free(td->io_ops->data);
268 td->io_ops->data = NULL;
272 static int fio_netio_init(struct thread_data *td)
277 * Hack to work-around the ->setup() function calling init on its
278 * own, since it needs ->io_ops->data to be set up.
280 if (td->io_ops->data)
283 nd = malloc(sizeof(*nd));
284 nd->last_io_u = NULL;
285 td->io_ops->data = nd;
289 static struct ioengine_ops ioengine = {
291 .version = FIO_IOOPS_VERSION,
292 .init = fio_netio_init,
293 .prep = fio_netio_prep,
294 .queue = fio_netio_queue,
295 .getevents = fio_netio_getevents,
296 .event = fio_netio_event,
297 .cleanup = fio_netio_cleanup,
298 .setup = fio_netio_setup,
299 .flags = FIO_SYNCIO | FIO_NETIO,
302 static void fio_init fio_netio_register(void)
304 register_ioengine(&ioengine);
307 static void fio_exit fio_netio_unregister(void)
309 unregister_ioengine(&ioengine);