| /* |
| * net engine |
| * |
| * IO engine that reads/writes to/from sockets. |
| * |
| */ |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <errno.h> |
| #include <assert.h> |
| #include <netinet/in.h> |
| #include <arpa/inet.h> |
| #include <netdb.h> |
| #include <sys/poll.h> |
| #include <sys/types.h> |
| #include <sys/socket.h> |
| |
| #include "../fio.h" |
| |
| struct netio_data { |
| int listenfd; |
| int send_to_net; |
| int use_splice; |
| int net_protocol; |
| int pipes[2]; |
| char host[64]; |
| struct sockaddr_in addr; |
| }; |
| |
| struct udp_close_msg { |
| uint32_t magic; |
| uint32_t cmd; |
| }; |
| |
| enum { |
| FIO_LINK_CLOSE = 0x89, |
| FIO_LINK_CLOSE_MAGIC = 0x6c696e6b, |
| }; |
| |
| /* |
| * Return -1 for error and 'nr events' for a positive number |
| * of events |
| */ |
| static int poll_wait(struct thread_data *td, int fd, short events) |
| { |
| struct pollfd pfd; |
| int ret; |
| |
| while (!td->terminate) { |
| pfd.fd = fd; |
| pfd.events = events; |
| ret = poll(&pfd, 1, -1); |
| if (ret < 0) { |
| if (errno == EINTR) |
| break; |
| |
| td_verror(td, errno, "poll"); |
| return -1; |
| } else if (!ret) |
| continue; |
| |
| break; |
| } |
| |
| if (pfd.revents & events) |
| return 1; |
| |
| return -1; |
| } |
| |
| static int fio_netio_prep(struct thread_data *td, struct io_u *io_u) |
| { |
| struct netio_data *nd = td->io_ops->data; |
| |
| /* |
| * Make sure we don't see spurious reads to a receiver, and vice versa |
| */ |
| if ((nd->send_to_net && io_u->ddir == DDIR_READ) || |
| (!nd->send_to_net && io_u->ddir == DDIR_WRITE)) { |
| td_verror(td, EINVAL, "bad direction"); |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| #ifdef FIO_HAVE_SPLICE |
| static int splice_io_u(int fdin, int fdout, unsigned int len) |
| { |
| int bytes = 0; |
| |
| while (len) { |
| int ret = splice(fdin, NULL, fdout, NULL, len, 0); |
| |
| if (ret < 0) { |
| if (!bytes) |
| bytes = ret; |
| |
| break; |
| } else if (!ret) |
| break; |
| |
| bytes += ret; |
| len -= ret; |
| } |
| |
| return bytes; |
| } |
| |
| /* |
| * Receive bytes from a socket and fill them into the internal pipe |
| */ |
| static int splice_in(struct thread_data *td, struct io_u *io_u) |
| { |
| struct netio_data *nd = td->io_ops->data; |
| |
| return splice_io_u(io_u->file->fd, nd->pipes[1], io_u->xfer_buflen); |
| } |
| |
| /* |
| * Transmit 'len' bytes from the internal pipe |
| */ |
| static int splice_out(struct thread_data *td, struct io_u *io_u, |
| unsigned int len) |
| { |
| struct netio_data *nd = td->io_ops->data; |
| |
| return splice_io_u(nd->pipes[0], io_u->file->fd, len); |
| } |
| |
| static int vmsplice_io_u(struct io_u *io_u, int fd, unsigned int len) |
| { |
| struct iovec iov = { |
| .iov_base = io_u->xfer_buf, |
| .iov_len = len, |
| }; |
| int bytes = 0; |
| |
| while (iov.iov_len) { |
| int ret = vmsplice(fd, &iov, 1, SPLICE_F_MOVE); |
| |
| if (ret < 0) { |
| if (!bytes) |
| bytes = ret; |
| break; |
| } else if (!ret) |
| break; |
| |
| iov.iov_len -= ret; |
| iov.iov_base += ret; |
| bytes += ret; |
| } |
| |
| return bytes; |
| |
| } |
| |
| /* |
| * vmsplice() pipe to io_u buffer |
| */ |
| static int vmsplice_io_u_out(struct thread_data *td, struct io_u *io_u, |
| unsigned int len) |
| { |
| struct netio_data *nd = td->io_ops->data; |
| |
| return vmsplice_io_u(io_u, nd->pipes[0], len); |
| } |
| |
| /* |
| * vmsplice() io_u to pipe |
| */ |
| static int vmsplice_io_u_in(struct thread_data *td, struct io_u *io_u) |
| { |
| struct netio_data *nd = td->io_ops->data; |
| |
| return vmsplice_io_u(io_u, nd->pipes[1], io_u->xfer_buflen); |
| } |
| |
| /* |
| * splice receive - transfer socket data into a pipe using splice, then map |
| * that pipe data into the io_u using vmsplice. |
| */ |
| static int fio_netio_splice_in(struct thread_data *td, struct io_u *io_u) |
| { |
| int ret; |
| |
| ret = splice_in(td, io_u); |
| if (ret > 0) |
| return vmsplice_io_u_out(td, io_u, ret); |
| |
| return ret; |
| } |
| |
| /* |
| * splice transmit - map data from the io_u into a pipe by using vmsplice, |
| * then transfer that pipe to a socket using splice. |
| */ |
| static int fio_netio_splice_out(struct thread_data *td, struct io_u *io_u) |
| { |
| int ret; |
| |
| ret = vmsplice_io_u_in(td, io_u); |
| if (ret > 0) |
| return splice_out(td, io_u, ret); |
| |
| return ret; |
| } |
| #else |
| static int fio_netio_splice_in(struct thread_data *td, struct io_u *io_u) |
| { |
| errno = EOPNOTSUPP; |
| return -1; |
| } |
| |
| static int fio_netio_splice_out(struct thread_data *td, struct io_u *io_u) |
| { |
| errno = EOPNOTSUPP; |
| return -1; |
| } |
| #endif |
| |
| static int fio_netio_send(struct thread_data *td, struct io_u *io_u) |
| { |
| struct netio_data *nd = td->io_ops->data; |
| int ret, flags = MSG_DONTWAIT; |
| |
| do { |
| if (nd->net_protocol == IPPROTO_UDP) { |
| struct sockaddr *to = (struct sockaddr *) &nd->addr; |
| |
| ret = sendto(io_u->file->fd, io_u->xfer_buf, |
| io_u->xfer_buflen, flags, to, |
| sizeof(*to)); |
| } else { |
| /* |
| * if we are going to write more, set MSG_MORE |
| */ |
| #ifdef MSG_MORE |
| if (td->this_io_bytes[DDIR_WRITE] + io_u->xfer_buflen < |
| td->o.size) |
| flags |= MSG_MORE; |
| #endif |
| ret = send(io_u->file->fd, io_u->xfer_buf, |
| io_u->xfer_buflen, flags); |
| } |
| if (ret > 0) |
| break; |
| |
| ret = poll_wait(td, io_u->file->fd, POLLOUT); |
| if (ret <= 0) |
| break; |
| |
| flags &= ~MSG_DONTWAIT; |
| } while (1); |
| |
| return ret; |
| } |
| |
| static int is_udp_close(struct io_u *io_u, int len) |
| { |
| struct udp_close_msg *msg; |
| |
| if (len != sizeof(struct udp_close_msg)) |
| return 0; |
| |
| msg = io_u->xfer_buf; |
| if (ntohl(msg->magic) != FIO_LINK_CLOSE_MAGIC) |
| return 0; |
| if (ntohl(msg->cmd) != FIO_LINK_CLOSE) |
| return 0; |
| |
| return 1; |
| } |
| |
| static int fio_netio_recv(struct thread_data *td, struct io_u *io_u) |
| { |
| struct netio_data *nd = td->io_ops->data; |
| int ret, flags = MSG_DONTWAIT; |
| |
| do { |
| if (nd->net_protocol == IPPROTO_UDP) { |
| socklen_t len = sizeof(nd->addr); |
| struct sockaddr *from = (struct sockaddr *) &nd->addr; |
| |
| ret = recvfrom(io_u->file->fd, io_u->xfer_buf, |
| io_u->xfer_buflen, flags, from, &len); |
| if (is_udp_close(io_u, ret)) { |
| td->done = 1; |
| return 0; |
| } |
| } else { |
| ret = recv(io_u->file->fd, io_u->xfer_buf, |
| io_u->xfer_buflen, flags); |
| } |
| if (ret > 0) |
| break; |
| |
| ret = poll_wait(td, io_u->file->fd, POLLIN); |
| if (ret <= 0) |
| break; |
| flags &= ~MSG_DONTWAIT; |
| flags |= MSG_WAITALL; |
| } while (1); |
| |
| return ret; |
| } |
| |
| static int fio_netio_queue(struct thread_data *td, struct io_u *io_u) |
| { |
| struct netio_data *nd = td->io_ops->data; |
| int ret; |
| |
| fio_ro_check(td, io_u); |
| |
| if (io_u->ddir == DDIR_WRITE) { |
| if (!nd->use_splice || nd->net_protocol == IPPROTO_UDP) |
| ret = fio_netio_send(td, io_u); |
| else |
| ret = fio_netio_splice_out(td, io_u); |
| } else if (io_u->ddir == DDIR_READ) { |
| if (!nd->use_splice || nd->net_protocol == IPPROTO_UDP) |
| ret = fio_netio_recv(td, io_u); |
| else |
| ret = fio_netio_splice_in(td, io_u); |
| } else |
| ret = 0; /* must be a SYNC */ |
| |
| if (ret != (int) io_u->xfer_buflen) { |
| if (ret >= 0) { |
| io_u->resid = io_u->xfer_buflen - ret; |
| io_u->error = 0; |
| return FIO_Q_COMPLETED; |
| } else { |
| int err = errno; |
| |
| if (io_u->ddir == DDIR_WRITE && err == EMSGSIZE) |
| return FIO_Q_BUSY; |
| |
| io_u->error = err; |
| } |
| } |
| |
| if (io_u->error) |
| td_verror(td, io_u->error, "xfer"); |
| |
| return FIO_Q_COMPLETED; |
| } |
| |
| static int fio_netio_connect(struct thread_data *td, struct fio_file *f) |
| { |
| struct netio_data *nd = td->io_ops->data; |
| int type; |
| |
| if (nd->net_protocol == IPPROTO_TCP) |
| type = SOCK_STREAM; |
| else |
| type = SOCK_DGRAM; |
| |
| f->fd = socket(AF_INET, type, nd->net_protocol); |
| if (f->fd < 0) { |
| td_verror(td, errno, "socket"); |
| return 1; |
| } |
| |
| if (nd->net_protocol == IPPROTO_UDP) |
| return 0; |
| |
| if (connect(f->fd, (struct sockaddr *) &nd->addr, sizeof(nd->addr)) < 0) { |
| td_verror(td, errno, "connect"); |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| static int fio_netio_accept(struct thread_data *td, struct fio_file *f) |
| { |
| struct netio_data *nd = td->io_ops->data; |
| socklen_t socklen = sizeof(nd->addr); |
| |
| if (nd->net_protocol == IPPROTO_UDP) { |
| f->fd = nd->listenfd; |
| return 0; |
| } |
| |
| log_info("fio: waiting for connection\n"); |
| |
| if (poll_wait(td, nd->listenfd, POLLIN) < 0) |
| return 1; |
| |
| f->fd = accept(nd->listenfd, (struct sockaddr *) &nd->addr, &socklen); |
| if (f->fd < 0) { |
| td_verror(td, errno, "accept"); |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| static int fio_netio_open_file(struct thread_data *td, struct fio_file *f) |
| { |
| if (td_read(td)) |
| return fio_netio_accept(td, f); |
| else |
| return fio_netio_connect(td, f); |
| } |
| |
| static void fio_netio_udp_close(struct thread_data *td, struct fio_file *f) |
| { |
| struct netio_data *nd = td->io_ops->data; |
| struct udp_close_msg msg; |
| struct sockaddr *to = (struct sockaddr *) &nd->addr; |
| int ret; |
| |
| msg.magic = htonl(FIO_LINK_CLOSE_MAGIC); |
| msg.cmd = htonl(FIO_LINK_CLOSE); |
| |
| ret = sendto(f->fd, &msg, sizeof(msg), MSG_WAITALL, to, |
| sizeof(nd->addr)); |
| if (ret < 0) |
| td_verror(td, errno, "sendto udp link close"); |
| } |
| |
| static int fio_netio_close_file(struct thread_data *td, struct fio_file *f) |
| { |
| struct netio_data *nd = td->io_ops->data; |
| |
| /* |
| * If this is an UDP connection, notify the receiver that we are |
| * closing down the link |
| */ |
| if (nd->net_protocol == IPPROTO_UDP) |
| fio_netio_udp_close(td, f); |
| |
| return generic_close_file(td, f); |
| } |
| |
| static int fio_netio_setup_connect(struct thread_data *td, const char *host, |
| unsigned short port) |
| { |
| struct netio_data *nd = td->io_ops->data; |
| |
| nd->addr.sin_family = AF_INET; |
| nd->addr.sin_port = htons(port); |
| |
| if (inet_aton(host, &nd->addr.sin_addr) != 1) { |
| struct hostent *hent; |
| |
| hent = gethostbyname(host); |
| if (!hent) { |
| td_verror(td, errno, "gethostbyname"); |
| return 1; |
| } |
| |
| memcpy(&nd->addr.sin_addr, hent->h_addr, 4); |
| } |
| |
| return 0; |
| } |
| |
| static int fio_netio_setup_listen(struct thread_data *td, short port) |
| { |
| struct netio_data *nd = td->io_ops->data; |
| int fd, opt, type; |
| |
| if (nd->net_protocol == IPPROTO_TCP) |
| type = SOCK_STREAM; |
| else |
| type = SOCK_DGRAM; |
| |
| fd = socket(AF_INET, type, nd->net_protocol); |
| if (fd < 0) { |
| td_verror(td, errno, "socket"); |
| return 1; |
| } |
| |
| opt = 1; |
| if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0) { |
| td_verror(td, errno, "setsockopt"); |
| return 1; |
| } |
| #ifdef SO_REUSEPORT |
| if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)) < 0) { |
| td_verror(td, errno, "setsockopt"); |
| return 1; |
| } |
| #endif |
| |
| nd->addr.sin_family = AF_INET; |
| nd->addr.sin_addr.s_addr = htonl(INADDR_ANY); |
| nd->addr.sin_port = htons(port); |
| |
| if (bind(fd, (struct sockaddr *) &nd->addr, sizeof(nd->addr)) < 0) { |
| td_verror(td, errno, "bind"); |
| return 1; |
| } |
| if (nd->net_protocol == IPPROTO_TCP && listen(fd, 1) < 0) { |
| td_verror(td, errno, "listen"); |
| return 1; |
| } |
| |
| nd->listenfd = fd; |
| return 0; |
| } |
| |
| static int fio_netio_init(struct thread_data *td) |
| { |
| struct netio_data *nd = td->io_ops->data; |
| unsigned int port; |
| char host[64], buf[128]; |
| char *sep, *portp, *modep; |
| int ret; |
| |
| if (td_rw(td)) { |
| log_err("fio: network connections must be read OR write\n"); |
| return 1; |
| } |
| if (td_random(td)) { |
| log_err("fio: network IO can't be random\n"); |
| return 1; |
| } |
| |
| strcpy(buf, td->o.filename); |
| |
| sep = strchr(buf, '/'); |
| if (!sep) |
| goto bad_host; |
| |
| *sep = '\0'; |
| sep++; |
| strcpy(host, buf); |
| if (!strlen(host)) |
| goto bad_host; |
| |
| modep = NULL; |
| portp = sep; |
| sep = strchr(portp, '/'); |
| if (sep) { |
| *sep = '\0'; |
| modep = sep + 1; |
| } |
| |
| port = strtol(portp, NULL, 10); |
| if (!port || port > 65535) |
| goto bad_host; |
| |
| if (modep) { |
| if (!strncmp("tcp", modep, strlen(modep)) || |
| !strncmp("TCP", modep, strlen(modep))) |
| nd->net_protocol = IPPROTO_TCP; |
| else if (!strncmp("udp", modep, strlen(modep)) || |
| !strncmp("UDP", modep, strlen(modep))) |
| nd->net_protocol = IPPROTO_UDP; |
| else |
| goto bad_host; |
| } else |
| nd->net_protocol = IPPROTO_TCP; |
| |
| if (td_read(td)) { |
| nd->send_to_net = 0; |
| ret = fio_netio_setup_listen(td, port); |
| } else { |
| nd->send_to_net = 1; |
| ret = fio_netio_setup_connect(td, host, port); |
| } |
| |
| return ret; |
| bad_host: |
| log_err("fio: bad network host/port/protocol: %s\n", td->o.filename); |
| return 1; |
| } |
| |
| static void fio_netio_cleanup(struct thread_data *td) |
| { |
| struct netio_data *nd = td->io_ops->data; |
| |
| if (nd) { |
| if (nd->listenfd != -1) |
| close(nd->listenfd); |
| if (nd->pipes[0] != -1) |
| close(nd->pipes[0]); |
| if (nd->pipes[1] != -1) |
| close(nd->pipes[1]); |
| |
| free(nd); |
| } |
| } |
| |
| static int fio_netio_setup(struct thread_data *td) |
| { |
| struct netio_data *nd; |
| |
| if (!td->io_ops->data) { |
| nd = malloc(sizeof(*nd));; |
| |
| memset(nd, 0, sizeof(*nd)); |
| nd->listenfd = -1; |
| nd->pipes[0] = nd->pipes[1] = -1; |
| td->io_ops->data = nd; |
| } |
| |
| return 0; |
| } |
| |
| #ifdef FIO_HAVE_SPLICE |
| static int fio_netio_setup_splice(struct thread_data *td) |
| { |
| struct netio_data *nd; |
| |
| fio_netio_setup(td); |
| |
| nd = td->io_ops->data; |
| if (nd) { |
| if (pipe(nd->pipes) < 0) |
| return 1; |
| |
| nd->use_splice = 1; |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| static struct ioengine_ops ioengine_splice = { |
| .name = "netsplice", |
| .version = FIO_IOOPS_VERSION, |
| .prep = fio_netio_prep, |
| .queue = fio_netio_queue, |
| .setup = fio_netio_setup_splice, |
| .init = fio_netio_init, |
| .cleanup = fio_netio_cleanup, |
| .open_file = fio_netio_open_file, |
| .close_file = generic_close_file, |
| .flags = FIO_SYNCIO | FIO_DISKLESSIO | FIO_UNIDIR | |
| FIO_SIGQUIT, |
| }; |
| #endif |
| |
| static struct ioengine_ops ioengine_rw = { |
| .name = "net", |
| .version = FIO_IOOPS_VERSION, |
| .prep = fio_netio_prep, |
| .queue = fio_netio_queue, |
| .setup = fio_netio_setup, |
| .init = fio_netio_init, |
| .cleanup = fio_netio_cleanup, |
| .open_file = fio_netio_open_file, |
| .close_file = fio_netio_close_file, |
| .flags = FIO_SYNCIO | FIO_DISKLESSIO | FIO_UNIDIR | |
| FIO_SIGQUIT, |
| }; |
| |
| static void fio_init fio_netio_register(void) |
| { |
| register_ioengine(&ioengine_rw); |
| #ifdef FIO_HAVE_SPLICE |
| register_ioengine(&ioengine_splice); |
| #endif |
| } |
| |
| static void fio_exit fio_netio_unregister(void) |
| { |
| unregister_ioengine(&ioengine_rw); |
| #ifdef FIO_HAVE_SPLICE |
| unregister_ioengine(&ioengine_splice); |
| #endif |
| } |