Enable nfs mount in both dynamic and static busybox.
With this change, busybox is able to do NFSv3 mounts, if the kernel
has been compiled with NFS client support.
While busybox already includes the neccessary code in
util-linux/mount.c, the required SUN RPC library was missing. It is
included here in the librpc/ subdirectory. The librpc/ code was taken
from http://nbd.name/gitweb.cgi?p=uclibc-rpc.git;a=summary and modified
a bit, mostly in librpc/rpc/types.h, to properly compile for Android/CM9.
I also compared the code to the current official uclibc GIT - it was
almost identical, except for a funny thread support thing in the
official uclibc sources which wouldn't have worked, and a small
fix from there which I incorporated in clnt_{tcp,udp,unix}.c,
where a break was missing from a case.
Tested on a maguro build of the current CM9, together with a kernel
out of codeworkx git / experimental branch, with NFS enabled.
Amended 2012/02/29: do not build librpc / nfs mounting
into minimal (recovery) busybox.
Amended 2012/03/05: move to android/librpc, build as static lib
Change-Id: I587ed7c60aa7dd10828213ae2b8675579d126e8e
diff --git a/android/librpc/pmap_rmt.c b/android/librpc/pmap_rmt.c
new file mode 100644
index 0000000..68089ae
--- /dev/null
+++ b/android/librpc/pmap_rmt.c
@@ -0,0 +1,440 @@
+/* @(#)pmap_rmt.c 2.2 88/08/01 4.0 RPCSRC */
+/*
+ * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
+ * unrestricted use provided that this legend is included on all tape
+ * media and as a part of the software program in whole or part. Users
+ * may copy or modify Sun RPC without charge, but are not authorized
+ * to license or distribute it to anyone else except as part of a product or
+ * program developed by the user.
+ *
+ * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
+ * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
+ *
+ * Sun RPC is provided with no support and without any obligation on the
+ * part of Sun Microsystems, Inc. to assist in its use, correction,
+ * modification or enhancement.
+ *
+ * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
+ * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
+ * OR ANY PART THEREOF.
+ *
+ * In no event will Sun Microsystems, Inc. be liable for any lost revenue
+ * or profits or other special, indirect and consequential damages, even if
+ * Sun has been advised of the possibility of such damages.
+ *
+ * Sun Microsystems, Inc.
+ * 2550 Garcia Avenue
+ * Mountain View, California 94043
+ */
+#if 0
+static char sccsid[] = "@(#)pmap_rmt.c 1.21 87/08/27 Copyr 1984 Sun Micro";
+#endif
+
+/*
+ * pmap_rmt.c
+ * Client interface to pmap rpc service.
+ * remote call and broadcast service
+ *
+ * Copyright (C) 1984, Sun Microsystems, Inc.
+ */
+
+#define __FORCE_GLIBC
+#include <features.h>
+
+#include <unistd.h>
+#include <string.h>
+#include <rpc/rpc.h>
+#include <rpc/pmap_prot.h>
+#include <rpc/pmap_clnt.h>
+#include <rpc/pmap_rmt.h>
+#include <sys/poll.h>
+#include <sys/socket.h>
+#include <stdio.h>
+#include <errno.h>
+#undef _POSIX_SOURCE /* Ultrix <sys/param.h> needs --roland@gnu */
+#include <sys/param.h> /* Ultrix needs before net/if --roland@gnu */
+#include <net/if.h>
+#include <sys/ioctl.h>
+#include <arpa/inet.h>
+#define MAX_BROADCAST_SIZE 1400
+
+#ifdef ANDROID
+static struct in_addr inet_makeaddr(in_addr_t net, in_addr_t host)
+{
+ struct in_addr a;
+
+ if (net <= 0x000000ff)
+ a.s_addr = (net << 24) | (host & 0x000000ff);
+ else if (net <= 0x0000ffff)
+ a.s_addr = (net << 16) | (host & 0x0000ffff);
+ else if (net <= 0x00ffffff)
+ a.s_addr = (net << 8) | (host & 0x00ffffff);
+ else
+ a.s_addr = net | host;
+ a.s_addr = htonl(a.s_addr);
+ return a;
+}
+static in_addr_t inet_netof(struct in_addr in)
+{
+ in_addr_t i = ntohl(in.s_addr);
+
+ if (i < 0x80000000)
+ return i >> 24;
+ if (i < 0xc0000000)
+ return i >> 16;
+ return i >> 8;
+}
+
+#endif
+
+
+extern u_long _create_xid (void) attribute_hidden;
+
+static const struct timeval timeout = {3, 0};
+
+/*
+ * pmapper remote-call-service interface.
+ * This routine is used to call the pmapper remote call service
+ * which will look up a service program in the port maps, and then
+ * remotely call that routine with the given parameters. This allows
+ * programs to do a lookup and call in one step.
+ */
+enum clnt_stat
+pmap_rmtcall (struct sockaddr_in *addr, u_long prog, u_long vers, u_long proc,
+ xdrproc_t xdrargs, caddr_t argsp, xdrproc_t xdrres, caddr_t resp,
+ struct timeval tout, u_long *port_ptr)
+{
+ int _socket = -1;
+ CLIENT *client;
+ struct rmtcallargs a;
+ struct rmtcallres r;
+ enum clnt_stat stat;
+
+ addr->sin_port = htons (PMAPPORT);
+ client = clntudp_create (addr, PMAPPROG, PMAPVERS, timeout, &_socket);
+ if (client != (CLIENT *) NULL)
+ {
+ a.prog = prog;
+ a.vers = vers;
+ a.proc = proc;
+ a.args_ptr = argsp;
+ a.xdr_args = xdrargs;
+ r.port_ptr = port_ptr;
+ r.results_ptr = resp;
+ r.xdr_results = xdrres;
+ stat = CLNT_CALL (client, PMAPPROC_CALLIT, (xdrproc_t)xdr_rmtcall_args,
+ (caddr_t)&a, (xdrproc_t)xdr_rmtcallres,
+ (caddr_t)&r, tout);
+ CLNT_DESTROY (client);
+ }
+ else
+ {
+ stat = RPC_FAILED;
+ }
+ /* (void)close(_socket); CLNT_DESTROY already closed it */
+ addr->sin_port = 0;
+ return stat;
+}
+
+
+/*
+ * XDR remote call arguments
+ * written for XDR_ENCODE direction only
+ */
+bool_t
+xdr_rmtcall_args (XDR *xdrs, struct rmtcallargs *cap)
+{
+ u_int lenposition, argposition, position;
+
+ if (xdr_u_long (xdrs, &(cap->prog)) &&
+ xdr_u_long (xdrs, &(cap->vers)) &&
+ xdr_u_long (xdrs, &(cap->proc)))
+ {
+ u_long dummy_arglen = 0;
+ lenposition = XDR_GETPOS (xdrs);
+ if (!xdr_u_long (xdrs, &dummy_arglen))
+ return FALSE;
+ argposition = XDR_GETPOS (xdrs);
+ if (!(*(cap->xdr_args)) (xdrs, cap->args_ptr))
+ return FALSE;
+ position = XDR_GETPOS (xdrs);
+ cap->arglen = (u_long) position - (u_long) argposition;
+ XDR_SETPOS (xdrs, lenposition);
+ if (!xdr_u_long (xdrs, &(cap->arglen)))
+ return FALSE;
+ XDR_SETPOS (xdrs, position);
+ return TRUE;
+ }
+ return FALSE;
+}
+libc_hidden_def(xdr_rmtcall_args)
+
+/*
+ * XDR remote call results
+ * written for XDR_DECODE direction only
+ */
+bool_t
+xdr_rmtcallres (XDR *xdrs, struct rmtcallres *crp)
+{
+ caddr_t port_ptr;
+
+ port_ptr = (caddr_t) crp->port_ptr;
+ if (xdr_reference (xdrs, &port_ptr, sizeof (u_long), (xdrproc_t) xdr_u_long)
+ && xdr_u_long (xdrs, &crp->resultslen))
+ {
+ crp->port_ptr = (u_long *) port_ptr;
+ return (*(crp->xdr_results)) (xdrs, crp->results_ptr);
+ }
+ return FALSE;
+}
+libc_hidden_def(xdr_rmtcallres)
+
+
+/*
+ * The following is kludged-up support for simple rpc broadcasts.
+ * Someday a large, complicated system will replace these trivial
+ * routines which only support udp/ip .
+ */
+
+static int
+internal_function
+getbroadcastnets (struct in_addr *addrs, int sock, char *buf)
+ /* int sock: any valid socket will do */
+ /* char *buf: why allocate more when we can use existing... */
+{
+ struct ifconf ifc;
+ struct ifreq ifreq, *ifr;
+ struct sockaddr_in *sin;
+ int n, i;
+
+ ifc.ifc_len = UDPMSGSIZE;
+ ifc.ifc_buf = buf;
+ if (ioctl (sock, SIOCGIFCONF, (char *) &ifc) < 0)
+ {
+ perror (_("broadcast: ioctl (get interface configuration)"));
+ return (0);
+ }
+ ifr = ifc.ifc_req;
+ for (i = 0, n = ifc.ifc_len / sizeof (struct ifreq); n > 0; n--, ifr++)
+ {
+ ifreq = *ifr;
+ if (ioctl (sock, SIOCGIFFLAGS, (char *) &ifreq) < 0)
+ {
+ perror (_("broadcast: ioctl (get interface flags)"));
+ continue;
+ }
+ if ((ifreq.ifr_flags & IFF_BROADCAST) &&
+ (ifreq.ifr_flags & IFF_UP) &&
+ ifr->ifr_addr.sa_family == AF_INET)
+ {
+ sin = (struct sockaddr_in *) &ifr->ifr_addr;
+#ifdef SIOCGIFBRDADDR /* 4.3BSD */
+ if (ioctl (sock, SIOCGIFBRDADDR, (char *) &ifreq) < 0)
+ {
+ addrs[i++] = inet_makeaddr (inet_netof
+ /* Changed to pass struct instead of s_addr member
+ by roland@gnu. */
+ (sin->sin_addr), INADDR_ANY);
+ }
+ else
+ {
+ addrs[i++] = ((struct sockaddr_in *)
+ &ifreq.ifr_addr)->sin_addr;
+ }
+#else /* 4.2 BSD */
+ addrs[i++] = inet_makeaddr (inet_netof
+ (sin->sin_addr.s_addr), INADDR_ANY);
+#endif
+ }
+ }
+ return i;
+}
+
+
+enum clnt_stat
+clnt_broadcast (
+ u_long prog, /* program number */
+ u_long vers, /* version number */
+ u_long proc, /* procedure number */
+ xdrproc_t xargs, /* xdr routine for args */
+ caddr_t argsp, /* pointer to args */
+ xdrproc_t xresults, /* xdr routine for results */
+ caddr_t resultsp, /* pointer to results */
+ resultproc_t eachresult /* call with each result obtained */)
+{
+ enum clnt_stat stat = RPC_FAILED;
+ AUTH *unix_auth = authunix_create_default ();
+ XDR xdr_stream;
+ XDR *xdrs = &xdr_stream;
+ struct timeval t;
+ int outlen, inlen, nets;
+ socklen_t fromlen;
+ int sock;
+ int on = 1;
+ struct pollfd fd;
+ int milliseconds;
+ int i;
+ bool_t done = FALSE;
+ u_long xid;
+ u_long port;
+ struct in_addr addrs[20];
+ struct sockaddr_in baddr, raddr; /* broadcast and response addresses */
+ struct rmtcallargs a;
+ struct rmtcallres r;
+ struct rpc_msg msg;
+ char outbuf[MAX_BROADCAST_SIZE], inbuf[UDPMSGSIZE];
+
+ /*
+ * initialization: create a socket, a broadcast address, and
+ * preserialize the arguments into a send buffer.
+ */
+ if ((sock = socket (AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
+ {
+ perror (_("Cannot create socket for broadcast rpc"));
+ stat = RPC_CANTSEND;
+ goto done_broad;
+ }
+#ifdef SO_BROADCAST
+ if (setsockopt (sock, SOL_SOCKET, SO_BROADCAST, &on, sizeof (on)) < 0)
+ {
+ perror (_("Cannot set socket option SO_BROADCAST"));
+ stat = RPC_CANTSEND;
+ goto done_broad;
+ }
+#endif /* def SO_BROADCAST */
+ fd.fd = sock;
+ fd.events = POLLIN;
+ nets = getbroadcastnets (addrs, sock, inbuf);
+ memset ((char *) &baddr, 0, sizeof (baddr));
+ baddr.sin_family = AF_INET;
+ baddr.sin_port = htons (PMAPPORT);
+ baddr.sin_addr.s_addr = htonl (INADDR_ANY);
+/* baddr.sin_addr.S_un.S_addr = htonl(INADDR_ANY); */
+ msg.rm_xid = xid = _create_xid ();
+ t.tv_usec = 0;
+ msg.rm_direction = CALL;
+ msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
+ msg.rm_call.cb_prog = PMAPPROG;
+ msg.rm_call.cb_vers = PMAPVERS;
+ msg.rm_call.cb_proc = PMAPPROC_CALLIT;
+ msg.rm_call.cb_cred = unix_auth->ah_cred;
+ msg.rm_call.cb_verf = unix_auth->ah_verf;
+ a.prog = prog;
+ a.vers = vers;
+ a.proc = proc;
+ a.xdr_args = xargs;
+ a.args_ptr = argsp;
+ r.port_ptr = &port;
+ r.xdr_results = xresults;
+ r.results_ptr = resultsp;
+ xdrmem_create (xdrs, outbuf, MAX_BROADCAST_SIZE, XDR_ENCODE);
+ if ((!xdr_callmsg (xdrs, &msg)) || (!xdr_rmtcall_args (xdrs, &a)))
+ {
+ stat = RPC_CANTENCODEARGS;
+ goto done_broad;
+ }
+ outlen = (int) xdr_getpos (xdrs);
+ xdr_destroy (xdrs);
+ /*
+ * Basic loop: broadcast a packet and wait a while for response(s).
+ * The response timeout grows larger per iteration.
+ */
+ for (t.tv_sec = 4; t.tv_sec <= 14; t.tv_sec += 2)
+ {
+ for (i = 0; i < nets; i++)
+ {
+ baddr.sin_addr = addrs[i];
+ if (sendto (sock, outbuf, outlen, 0,
+ (struct sockaddr *) &baddr,
+ sizeof (struct sockaddr)) != outlen)
+ {
+ perror (_("Cannot send broadcast packet"));
+ stat = RPC_CANTSEND;
+ goto done_broad;
+ }
+ }
+ if (eachresult == NULL)
+ {
+ stat = RPC_SUCCESS;
+ goto done_broad;
+ }
+ recv_again:
+ msg.acpted_rply.ar_verf = _null_auth;
+ msg.acpted_rply.ar_results.where = (caddr_t) & r;
+ msg.acpted_rply.ar_results.proc = (xdrproc_t) xdr_rmtcallres;
+ milliseconds = t.tv_sec * 1000 + t.tv_usec / 1000;
+ switch (poll(&fd, 1, milliseconds))
+ {
+
+ case 0: /* timed out */
+ stat = RPC_TIMEDOUT;
+ continue;
+
+ case -1: /* some kind of error */
+ if (errno == EINTR)
+ goto recv_again;
+ perror (_("Broadcast poll problem"));
+ stat = RPC_CANTRECV;
+ goto done_broad;
+
+ } /* end of poll results switch */
+ try_again:
+ fromlen = sizeof (struct sockaddr);
+ inlen = recvfrom (sock, inbuf, UDPMSGSIZE, 0,
+ (struct sockaddr *) &raddr, &fromlen);
+ if (inlen < 0)
+ {
+ if (errno == EINTR)
+ goto try_again;
+ perror (_("Cannot receive reply to broadcast"));
+ stat = RPC_CANTRECV;
+ goto done_broad;
+ }
+ if ((size_t) inlen < sizeof (u_long))
+ goto recv_again;
+ /*
+ * see if reply transaction id matches sent id.
+ * If so, decode the results.
+ */
+ xdrmem_create (xdrs, inbuf, (u_int) inlen, XDR_DECODE);
+ if (xdr_replymsg (xdrs, &msg))
+ {
+ if (((u_int32_t) msg.rm_xid == (u_int32_t) xid) &&
+ (msg.rm_reply.rp_stat == MSG_ACCEPTED) &&
+ (msg.acpted_rply.ar_stat == SUCCESS))
+ {
+ raddr.sin_port = htons ((u_short) port);
+ done = (*eachresult) (resultsp, &raddr);
+ }
+ /* otherwise, we just ignore the errors ... */
+ }
+ else
+ {
+#ifdef notdef
+ /* some kind of deserialization problem ... */
+ if ((u_int32_t) msg.rm_xid == (u_int32_t) xid)
+ fprintf (stderr, "Broadcast deserialization problem");
+ /* otherwise, just random garbage */
+#endif
+ }
+ xdrs->x_op = XDR_FREE;
+ msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void;
+ (void) xdr_replymsg (xdrs, &msg);
+ (void) (*xresults) (xdrs, resultsp);
+ xdr_destroy (xdrs);
+ if (done)
+ {
+ stat = RPC_SUCCESS;
+ goto done_broad;
+ }
+ else
+ {
+ goto recv_again;
+ }
+ }
+done_broad:
+ (void) close (sock);
+ AUTH_DESTROY (unix_auth);
+ return stat;
+}