#include <syslog.h>
#include <stdlib.h>
#include <sys/mount.h>
+#include <errno.h>
#ifndef __GNUC__
#error I need GCC to work
#define MY_NAME "nbd_client"
#include "cliserv.h"
-int opennet(char *name, int port) {
+int check_conn(char* devname) {
+ char buf[256];
+ int fd;
+ int len;
+ if(!strncmp(devname, "/dev/", 5)) {
+ devname+=5;
+ }
+ snprintf(buf, 256, "/sys/block/%s/pid", devname);
+ if((fd=open(buf, O_RDONLY))<0) {
+ if(errno==ENOENT) {
+ return 1;
+ } else {
+ return 2;
+ }
+ }
+ len=read(fd, buf, 256);
+ buf[len-1]='\0';
+ printf("%s\n", buf);
+ return 0;
+}
+
+int opennet(char *name, int port, int sdp) {
int sock;
struct sockaddr_in xaddrin;
int xaddrinlen = sizeof(xaddrin);
struct hostent *hostn;
+ int af;
hostn = gethostbyname(name);
if (!hostn)
err("Gethostname failed: %h\n");
- if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
+ af = AF_INET;
+ if(sdp) {
+#ifdef WITH_SDP
+ af = AF_INET_SDP;
+#else
+ err("Can't do SDP: I was not compiled with SDP support!");
+#endif
+ }
+ if ((sock = socket(af, SOCK_STREAM, IPPROTO_TCP)) < 0)
err("Socket failed: %m");
- xaddrin.sin_family = AF_INET;
+ xaddrin.sin_family = af;
xaddrin.sin_port = htons(port);
xaddrin.sin_addr.s_addr = *((int *) hostn->h_addr);
if ((connect(sock, (struct sockaddr *) &xaddrin, xaddrinlen) < 0))
int swap=0;
int cont=0;
int timeout=0;
+ int sdp=0;
u64 size64;
u32 flags;
fprintf(stderr, "nbd-client version %s\n", PACKAGE_VERSION);
fprintf(stderr, "Usage: nbd-client [bs=blocksize] [timeout=sec] host port nbd_device [-swap] [-persist]\n");
fprintf(stderr, "Or : nbd-client -d nbd_device\n");
+ fprintf(stderr, "Or : nbd-client -c nbd_device\n");
fprintf(stderr, "Default value for blocksize is 1024 (recommended for ethernet)\n");
fprintf(stderr, "Allowed values for blocksize are 512,1024,2048,4096\n"); /* will be checked in kernel :) */
fprintf(stderr, "Note, that kernel 2.4.2 and older ones do not work correctly with\n");
printf("done\n");
return 0;
}
+ if(strcmp(argv[0], "-c")==0) {
+ return check_conn(argv[1]);
+ }
if (strncmp(argv[0], "bs=", 3)==0) {
blocksize=atoi(argv[0]+3);
++argv; --argc; /* skip port */
if (argc==0) goto errmsg;
- sock = opennet(hostname, port);
nbddev = argv[0];
nbd = open(nbddev, O_RDWR);
if (nbd < 0)
err("Can not open NBD: %m");
++argv; --argc; /* skip device */
- if (argc>2) goto errmsg;
- if (argc!=0) {
+ if (argc>3) goto errmsg;
+ if (argc) {
if(strncmp(argv[0], "-swap", 5)==0) {
swap=1;
++argv;--argc;
}
}
- if (argc!=0) {
+ if (argc) {
if(strncmp(argv[0], "-persist", 8)==0) {
cont=1;
++argv;--argc;
}
}
+ if (argc) {
+ if(strncmp(argv[0], "-sdp", 4)==0) {
+ sdp=1;
+ ++argv;--argc;
+ }
+ }
+ if(argc) goto errmsg;
+ sock = opennet(hostname, port, sdp);
argv=NULL; argc=0; /* don't use it later suddenly */
negotiate(sock, &size64, &flags);
fprintf(stderr, " Reconnecting\n");
close(sock); close(nbd);
- sock = opennet(hostname, port);
+ sock = opennet(hostname, port, sdp);
nbd = open(nbddev, O_RDWR);
negotiate(sock, &new_size, &new_flags);
if (size64 != new_size) {