changeset 1392:6fbbe46b35d5 draft

Apparently I deleted this locally but forgot to commit the removal. Oops.
author Rob Landley <rob@landley.net>
date Thu, 17 Jul 2014 22:52:58 -0500
parents 6a06541c090c
children 3e8ab37a4b60
files toys/pending/nbd_client.c
diffstat 1 files changed, 0 insertions(+), 136 deletions(-) [+]
line wrap: on
line diff
--- a/toys/pending/nbd_client.c	Thu Jul 17 22:50:49 2014 -0500
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,136 +0,0 @@
-/* vi: set sw=4 ts=4:
- *
- * nbd-client.c - network block device client
- *
- * Copyright 2010 Rob Landley <rob@landley.net>
- *
- * Not in SUSv4.
-
-USE_NBD_CLIENT(NEWTOY(nbd_client, "<3>3ns", TOYFLAG_USR|TOYFLAG_BIN))
-
-config NBD_CLIENT
-  bool "nbd-client"
-  default n
-  help
-    usage: nbd-client [-ns] HOST PORT DEVICE
-
-    -n	Do not fork into background
-    -s	nbd swap support (lock server into memory)
-*/
-
-/*
-    Usage: nbd-client [-sSpn] [-b BLKSZ] [-t SECS] [-N name] HOST PORT DEVICE
-
-    -b	block size
-    -t	timeout in seconds
-    -S	sdp
-    -p	persist
-    -n	nofork
-    -d	DEVICE
-    -c	DEVICE
-*/
-
-#define FOR_nbd_client
-#include "toys.h"
-
-#define NBD_SET_SOCK          _IO(0xab, 0)
-#define NBD_SET_BLKSIZE       _IO(0xab, 1)
-#define NBD_SET_SIZE          _IO(0xab, 2)
-#define NBD_DO_IT             _IO(0xab, 3)
-#define NBD_CLEAR_SOCK        _IO(0xab, 4)
-#define NBD_CLEAR_QUEUE       _IO(0xab, 5)
-#define NBD_PRINT_DEBUG       _IO(0xab, 6)
-#define NBD_SET_SIZE_BLOCKS   _IO(0xab, 7)
-#define NBD_DISCONNECT        _IO(0xab, 8)
-#define NBD_SET_TIMEOUT       _IO(0xab, 9)
-
-void nbd_client_main(void)
-{
-  int sock = -1, nbd, flags;
-  unsigned long timeout = 0;
-  struct addrinfo *addr, *p;
-  char *host=toys.optargs[0], *port=toys.optargs[1], *device=toys.optargs[2];
-  uint64_t devsize;
-
-  // Repeat until spanked
-
-  nbd = xopen(device, O_RDWR);
-  for (;;) {
-    int temp;
-    struct addrinfo hints;
-
-    // Find and connect to server
-
-    memset(&hints, 0, sizeof(hints));
-    hints.ai_family = PF_UNSPEC;
-    hints.ai_socktype = SOCK_STREAM;
-    if (getaddrinfo(host, port, &hints, &addr)) addr = 0;
-    for (p = addr; p; p = p->ai_next) {
-      sock = socket(p->ai_family, p->ai_socktype, p->ai_protocol);
-      if (-1 != connect(sock, p->ai_addr, p->ai_addrlen)) break;
-      close(sock);
-    }
-    freeaddrinfo(addr);
-
-    if (!p) perror_exit("%s:%s", host, port);
-
-    temp = 1;
-    setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &temp, sizeof(int));
-
-    // Read login data
-
-    xreadall(sock, toybuf, 152);
-    if (memcmp(toybuf, "NBDMAGIC\x00\x00\x42\x02\x81\x86\x12\x53", 16))
-      error_exit("bad login %s:%s", host, port);
-    devsize = SWAP_BE64(*(uint64_t *)(toybuf+16));
-    flags = SWAP_BE32(*(int *)(toybuf+24));
-
-    // Set 4k block size.  Everything uses that these days.
-    ioctl(nbd, NBD_SET_BLKSIZE, 4096);
-    ioctl(nbd, NBD_SET_SIZE_BLOCKS, devsize/4096);
-    ioctl(nbd, NBD_CLEAR_SOCK);
-
-    // If the sucker was exported read only, respect that locally.
-    temp = (flags & 2) ? 1 : 0;
-    xioctl(nbd, BLKROSET, &temp);
-
-    if (timeout && ioctl(nbd, NBD_SET_TIMEOUT, timeout)<0) break;
-    if (ioctl(nbd, NBD_SET_SOCK, sock) < 0) break;
-
-    if (toys.optflags & FLAG_s) mlockall(MCL_CURRENT|MCL_FUTURE);
-
-    // Open the device to force reread of the partition table.
-    if ((toys.optflags & FLAG_n) || !xfork()) {
-      char *s = strrchr(device, '/');
-      int i;
-
-      sprintf(toybuf, "/sys/block/%.32s/pid", s ? s+1 : device);
-      // Is it up yet? (Give it 10 seconds.)
-      for (i=0; i<100; i++) {
-        temp = open(toybuf, O_RDONLY);
-        if (temp == -1) msleep(100);
-        else {
-          close(temp);
-          break;
-        }
-      }
-      close(open(device, O_RDONLY));
-      if (!(toys.optflags & FLAG_n)) exit(0);
-    }
-
-    // Daemonize here.
-
-    daemon(0,0);
-
-    // Process NBD requests until further notice.
-
-    if (ioctl(nbd, NBD_DO_IT)>=0 || errno==EBADR) break;
-    close(sock);
-  }
-  close(nbd);
-
-  // Flush queue and exit.
-
-  ioctl(nbd, NBD_CLEAR_QUEUE);
-  ioctl(nbd, NBD_CLEAR_SOCK);
-}