--- /dev/null
+/*
+ * Test client to test the NBD server. Doesn't do anything useful, except
+ * checking that the server does, actually, work.
+ *
+ * Note that the only 'real' test is to check the client against a kernel. If
+ * it works here but does not work in the kernel, then that's most likely a bug
+ * in this program and/or in nbd-server.
+ *
+ * Copyright(c) 2006 Wouter Verhelst
+ *
+ * This program is Free Software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, in version 2.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <glib.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include "config.h"
+#include "lfs.h"
+#define MY_NAME "nbd-tester-client"
+#include "cliserv.h"
+
+static gchar errstr[1024];
+const static int errstr_len=1024;
+
+typedef enum {
+ CONNECTION_TYPE_NONE,
+ CONNECTION_TYPE_CONNECT,
+ CONNECTION_TYPE_INIT_PASSWD,
+ CONNECTION_TYPE_CLISERV,
+ CONNECTION_TYPE_FULL,
+} CONNECTION_TYPE;
+
+typedef enum {
+ CONNECTION_CLOSE_PROPERLY,
+ CONNECTION_CLOSE_FAST,
+} CLOSE_TYPE;
+
+inline int read_all(int f, void *buf, size_t len) {
+ ssize_t res;
+ while(len>0) {
+ if((res=read(f, buf, len)) <=0) {
+ snprintf(errstr, errstr_len, "Read failed: %s", strerror(errno));
+ return -1;
+ }
+ len-=res;
+ buf+=res;
+ }
+}
+
+int setup_connection(gchar *hostname, int port, CONNECTION_TYPE ctype) {
+ int sock;
+ struct hostent *host;
+ struct sockaddr_in addr;
+ char buf[256];
+ u64 tmp64;
+
+ sock=0;
+ if(ctype<CONNECTION_TYPE_CONNECT)
+ goto end;
+ if((sock=socket(PF_INET, SOCK_STREAM, IPPROTO_TCP))<0) {
+ strncpy(errstr, strerror(errno), errstr_len);
+ goto err;
+ }
+ setmysockopt(sock);
+ if(!(host=gethostbyname(hostname))) {
+ strncpy(errstr, strerror(errno), errstr_len);
+ goto err_open;
+ }
+ addr.sin_family=AF_INET;
+ addr.sin_port=htons(port);
+ addr.sin_addr.s_addr=*((int *) host->h_addr);
+ if((connect(sock, (struct sockaddr *)&addr, sizeof(addr))<0)) {
+ strncpy(errstr, strerror(errno), errstr_len);
+ goto err_open;
+ }
+ if(ctype<CONNECTION_TYPE_INIT_PASSWD)
+ goto end;
+ if(read_all(sock, buf, strlen(INIT_PASSWD))<0) {
+ snprintf(errstr, errstr_len, "Could not read INIT_PASSWD: %s",
+ strerror(errno));
+ goto err_open;
+ }
+ if(strlen(buf)==0) {
+ snprintf(errstr, errstr_len, "Server closed connection");
+ goto err_open;
+ }
+ if(strncmp(buf, INIT_PASSWD, strlen(INIT_PASSWD))) {
+ snprintf(errstr, errstr_len, "INIT_PASSWD does not match");
+ goto err_open;
+ }
+ if(ctype<CONNECTION_TYPE_CLISERV)
+ goto end;
+ if(read_all(sock, &tmp64, sizeof(tmp64))<0) {
+ snprintf(errstr, errstr_len, "Could not read cliserv_magic: %s",
+ strerror(errno));
+ goto err_open;
+ }
+ tmp64=ntohll(tmp64);
+ if(tmp64 != cliserv_magic) {
+ strncpy(errstr, "cliserv_magic does not match", errstr_len);
+ goto err_open;
+ }
+ if(ctype<CONNECTION_TYPE_FULL)
+ goto end;
+ /* The information we get now contains information on sizes. If
+ * we're here, that means we want a 'working' connection, but
+ * we're not interested in the sizes. So, read them but throw
+ * the values away. We need to read the size of the device (a
+ * 64bit integer) plus the reserved fields (128 bytes; should
+ * all be zeroes).
+ */
+ read_all(sock, buf, sizeof(tmp64)+128);
+ goto end;
+err_open:
+ close(sock);
+err:
+ sock=-1;
+end:
+ return sock;
+}
+
+int close_connection(int sock, CLOSE_TYPE type) {
+ struct nbd_request req;
+ u64 counter=0;
+
+ switch(type) {
+ case CONNECTION_CLOSE_PROPERLY:
+ req.magic=htonl(NBD_REQUEST_MAGIC);
+ req.type=htonl(NBD_CMD_DISC);
+ memcpy(&(req.handle), &(counter), sizeof(counter));
+ counter++;
+ req.from=0;
+ req.len=0;
+ if(write(sock, &req, sizeof(req))<0) {
+ snprintf(errstr, errstr_len, "Could not write to socket: %s", strerror(errno));
+ return -1;
+ }
+ case CONNECTION_CLOSE_FAST:
+ if(close(sock)<0) {
+ snprintf(errstr, errstr_len, "Could not close socket: %s", strerror(errno));
+ return -1;
+ }
+ break;
+ default:
+ g_critical("Your compiler is on crack!"); /* or I am buggy */
+ return -1;
+ }
+ return 0;
+}
+
+int read_packet_check_header(int sock, size_t datasize, long long int curhandle) {
+ struct nbd_reply rep;
+ int retval=0;
+ char buf[datasize];
+
+ read_all(sock, &rep, sizeof(rep));
+ rep.magic=ntohl(rep.magic);
+ rep.error=ntohl(rep.error);
+ if(rep.magic!=NBD_REPLY_MAGIC) {
+ snprintf(errstr, errstr_len, "Received package with incorrect reply_magic. Index of sent packages is %lld (0x%llX), received handle is %lld (0x%llX). Received magic 0x%lX, expected 0x%lX", curhandle, curhandle, *((u64*)rep.handle), *((u64*)rep.handle), rep.magic, NBD_REPLY_MAGIC);
+ retval=-1;
+ goto end;
+ }
+ if(rep.error) {
+ snprintf(errstr, errstr_len, "Received error from server: %ld (0x%lX). Handle is %lld (0x%llX).", rep.error, *((u64*)rep.handle), *((u64*)rep.handle));
+ retval=-1;
+ goto end;
+ }
+ read_all(sock, &buf, datasize);
+
+end:
+ return retval;
+}
+
+int throughput_test(gchar* hostname, int port, int sock, char sock_is_open, char close_sock) {
+ long long int i;
+ char buf[1024];
+ struct nbd_request req;
+ u64 size;
+ int requests=0;
+ fd_set set;
+ struct timeval tv;
+ int retval=0;
+ size_t tmp;
+ signed int do_write=TRUE;
+
+ if(!sock_is_open) {
+ if((sock=setup_connection(hostname, port, CONNECTION_TYPE_CLISERV))<0) {
+ g_warning("Could not open socket: %s", errstr);
+ retval=-1;
+ goto err;
+ }
+ } else {
+ /* Assume the file is at least 4k in size. Not much of a test
+ * this way, but, well. */
+ size=4096;
+ }
+ size=0;
+ if((tmp=read_all(sock, &size, sizeof(u64)))<0) {
+ retval=-1;
+ snprintf(errstr, errstr_len, "Could not read from socket: %s", strerror(errno));
+ goto err_open;
+ }
+ read_all(sock,&buf,128);
+ if(tmp==0) {
+ retval=-1;
+ snprintf(errstr, errstr_len, "Server closed connection unexpectedly when trying to read size of device in throughput test");
+ goto err;
+ }
+ size=ntohll(size);
+ req.magic=htonl(NBD_REQUEST_MAGIC);
+ req.type=htonl(NBD_CMD_READ);
+ req.len=htonl(1024);
+ for(i=0;i+1024<=size;i+=1024) {
+ if(do_write) {
+ *((u64*)req.handle)=i;
+ req.from=htonl(i);
+ write(sock, &req, sizeof(req));
+ printf("Requests(+): %d\n", ++requests);
+ }
+ do {
+ FD_ZERO(&set);
+ FD_SET(sock, &set);
+ tv.tv_sec=0;
+ tv.tv_usec=0;
+ select(sock+1, &set, NULL, NULL, &tv);
+ if(FD_ISSET(sock, &set)) {
+ /* Okay, there's something ready for
+ * reading here */
+ read_packet_check_header(sock, 1024, i);
+ printf("Requests(-): %d\n", --requests);
+ }
+ } while FD_ISSET(sock, &set);
+ /* Now wait until we can write again or until a second have
+ * passed, whichever comes first*/
+ FD_ZERO(&set);
+ FD_SET(sock, &set);
+ tv.tv_sec=1;
+ tv.tv_usec=0;
+ do_write=select(sock+1,NULL,&set,NULL,&tv);
+ if(!do_write) printf("Select finished\n");
+ if(do_write<0) {
+ snprintf(errstr, errstr_len, "select: %s", strerror(errno));
+ retval=-1;
+ goto err_open;
+ }
+ }
+ /* Now empty the read buffer */
+ do {
+ FD_ZERO(&set);
+ FD_SET(sock, &set);
+ tv.tv_sec=0;
+ tv.tv_usec=0;
+ select(sock+1, &set, NULL, NULL, &tv);
+ if(FD_ISSET(sock, &set)) {
+ /* Okay, there's something ready for
+ * reading here */
+ read_packet_check_header(sock, 1024, i);
+ printf("Requests(-): %d\n", --requests);
+ }
+ } while (requests);
+
+err_open:
+ if(close_sock) {
+ close_connection(sock, CONNECTION_CLOSE_PROPERLY);
+ }
+err:
+ return retval;
+}
+
+int main(int argc, char**argv) {
+ gchar *hostname;
+ long int p;
+ int port;
+ int sock;
+
+ if(argc<3) {
+ g_message("Not enough arguments");
+ g_message("Usage: %s <hostname> <port>", argv[0]);
+ exit(EXIT_FAILURE);
+ }
+ logging();
+ hostname=g_strdup(argv[1]);
+ p=(strtol(argv[2], NULL, 0));
+ if(p==LONG_MIN||p==LONG_MAX) {
+ g_critical("Could not parse port number: %s", strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+ port=(int)p;
+
+ if(throughput_test(hostname, port, sock, FALSE, TRUE)<0) {
+ g_warning("Could not run throughput test: %s", errstr);
+ exit(EXIT_FAILURE);
+ }
+
+ return 0;
+}
projects / nbd.git / commitdiff