15 #include <netinet/tcp.h>
16 #include <netinet/in.h>
19 #if SIZEOF_UNSIGNED_SHORT_INT==4
20 typedef unsigned short u32;
21 #elif SIZEOF_UNSIGNED_INT==4
22 typedef unsigned int u32;
23 #elif SIZEOF_UNSIGNED_LONG_INT==4
24 typedef unsigned long u32;
26 #error I need at least some 32-bit type
29 #if SIZEOF_UNSIGNED_INT==8
30 typedef unsigned int u64;
31 #elif SIZEOF_UNSIGNED_LONG_INT==8
32 typedef unsigned long u64;
33 #elif SIZEOF_UNSIGNED_LONG_LONG_INT==8
34 typedef unsigned long long u64;
36 #error I need at least some 64-bit type
43 #ifndef HAVE_FDATASYNC
44 #define fdatasync(arg) fsync(arg)
51 #ifndef _LARGEFILE_SOURCE
52 #define _LARGEFILE_SOURCE
54 #define _FILE_OFFSET_BITS 64
60 #define INIT_PASSWD "NBDMAGIC"
62 #define INFO(a) do { } while(0)
67 if (setsockopt(sock, SOL_SOCKET, SO_SNDBUF, &size,
sizeof(
int)) < 0)
68 INFO(
"(no sockopt/1: %m)");
72 if (setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &size,
sizeof(
int)) < 0)
73 INFO(
"(no sockopt/2: %m)");
77 if (setsockopt(sock, IPPROTO_TCP, TCP_MAXSEG, &size,
sizeof(
int)) < 0)
78 INFO(
"(no sockopt/3: %m)");
82 #ifndef G_GNUC_NORETURN
83 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ > 4)
84 #define G_GNUC_NORETURN __attribute__((__noreturn__))
85 #define G_GNUC_UNUSED __attribute__((unused))
87 #define G_GNUC_NORETURN
95 strncpy(s1, s,
sizeof(s1));
96 if ((s2 = strstr(s,
"%m"))) {
97 strcpy(s1 + (s2 - s), strerror(errno));
99 strcpy(s1 + strlen(s1), s2);
103 else if ((s2 = strstr(s,
"%h"))) {
104 strcpy(s1 + (s2 - s), hstrerror(h_errno));
106 strcpy(s1 + strlen(s1), s2);
110 s1[
sizeof(s1)-1] =
'\0';
112 syslog(LOG_ERR,
"%s", s1);
113 syslog(LOG_ERR,
"Exiting.");
115 fprintf(stderr,
"Error: %s\nExiting.\n", s1);
127 openlog(
MY_NAME, LOG_PID, LOG_DAEMON);
129 setvbuf(stdout, NULL, _IONBF, 0);
130 setvbuf(stderr, NULL, _IONBF, 0);
133 #ifdef WORDS_BIGENDIAN
139 u32 lo = a & 0xffffffff;
143 return ((u64) lo) << 32U | hi;
146 #define htonll ntohll
148 #define NBD_DEFAULT_PORT "10809"
152 #define NBD_OPT_EXPORT_NAME (1)
153 #define NBD_OPT_ABORT (2)
154 #define NBD_OPT_LIST (3)
157 #define NBD_REP_ACK (1)
158 #define NBD_REP_SERVER (2)
159 #define NBD_REP_FLAG_ERROR (1 << 31)
160 #define NBD_REP_ERR_UNSUP (1 | NBD_REP_FLAG_ERROR)
161 #define NBD_REP_ERR_POLICY (2 | NBD_REP_FLAG_ERROR)
162 #define NBD_REP_ERR_INVALID (3 | NBD_REP_FLAG_ERROR)
163 #define NBD_REP_ERR_PLATFORM (4 | NBD_REP_FLAG_ERROR)
166 #define NBD_FLAG_FIXED_NEWSTYLE (1 << 0)
168 #define NBD_FLAG_C_FIXED_NEWSTYLE NBD_FLAG_FIXED_NEWSTYLE
void setmysockopt(int sock)
void err_nonfatal(const char *s)
void err(const char *s) G_GNUC_NORETURN