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-rw-r--r--busybox/util-linux/nfsmount.c1026
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diff --git a/busybox/util-linux/nfsmount.c b/busybox/util-linux/nfsmount.c
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+++ b/busybox/util-linux/nfsmount.c
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+/* vi: set sw=4 ts=4: */
+/*
+ * nfsmount.c -- Linux NFS mount
+ * Copyright (C) 1993 Rick Sladkey <jrs@world.std.com>
+ *
+ * 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; either version 2, or (at your option)
+ * any later version.
+ *
+ * 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.
+ *
+ * Wed Feb 8 12:51:48 1995, biro@yggdrasil.com (Ross Biro): allow all port
+ * numbers to be specified on the command line.
+ *
+ * Fri, 8 Mar 1996 18:01:39, Swen Thuemmler <swen@uni-paderborn.de>:
+ * Omit the call to connect() for Linux version 1.3.11 or later.
+ *
+ * Wed Oct 1 23:55:28 1997: Dick Streefland <dick_streefland@tasking.com>
+ * Implemented the "bg", "fg" and "retry" mount options for NFS.
+ *
+ * 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@misiek.eu.org>
+ * - added Native Language Support
+ *
+ * Modified by Olaf Kirch and Trond Myklebust for new NFS code,
+ * plus NFSv3 stuff.
+ */
+
+/*
+ * nfsmount.c,v 1.1.1.1 1993/11/18 08:40:51 jrs Exp
+ */
+
+#include <unistd.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <netdb.h>
+#include <sys/socket.h>
+#include <time.h>
+#include <sys/utsname.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <stdlib.h>
+#include "busybox.h"
+#undef TRUE
+#undef FALSE
+#include <rpc/rpc.h>
+#include <rpc/pmap_prot.h>
+#include <rpc/pmap_clnt.h>
+#include "nfsmount.h"
+
+
+/*
+ * NFS stats. The good thing with these values is that NFSv3 errors are
+ * a superset of NFSv2 errors (with the exception of NFSERR_WFLUSH which
+ * no-one uses anyway), so we can happily mix code as long as we make sure
+ * no NFSv3 errors are returned to NFSv2 clients.
+ * Error codes that have a `--' in the v2 column are not part of the
+ * standard, but seem to be widely used nevertheless.
+ */
+enum nfs_stat {
+ NFS_OK = 0, /* v2 v3 */
+ NFSERR_PERM = 1, /* v2 v3 */
+ NFSERR_NOENT = 2, /* v2 v3 */
+ NFSERR_IO = 5, /* v2 v3 */
+ NFSERR_NXIO = 6, /* v2 v3 */
+ NFSERR_EAGAIN = 11, /* v2 v3 */
+ NFSERR_ACCES = 13, /* v2 v3 */
+ NFSERR_EXIST = 17, /* v2 v3 */
+ NFSERR_XDEV = 18, /* v3 */
+ NFSERR_NODEV = 19, /* v2 v3 */
+ NFSERR_NOTDIR = 20, /* v2 v3 */
+ NFSERR_ISDIR = 21, /* v2 v3 */
+ NFSERR_INVAL = 22, /* v2 v3 that Sun forgot */
+ NFSERR_FBIG = 27, /* v2 v3 */
+ NFSERR_NOSPC = 28, /* v2 v3 */
+ NFSERR_ROFS = 30, /* v2 v3 */
+ NFSERR_MLINK = 31, /* v3 */
+ NFSERR_OPNOTSUPP = 45, /* v2 v3 */
+ NFSERR_NAMETOOLONG = 63, /* v2 v3 */
+ NFSERR_NOTEMPTY = 66, /* v2 v3 */
+ NFSERR_DQUOT = 69, /* v2 v3 */
+ NFSERR_STALE = 70, /* v2 v3 */
+ NFSERR_REMOTE = 71, /* v2 v3 */
+ NFSERR_WFLUSH = 99, /* v2 */
+ NFSERR_BADHANDLE = 10001, /* v3 */
+ NFSERR_NOT_SYNC = 10002, /* v3 */
+ NFSERR_BAD_COOKIE = 10003, /* v3 */
+ NFSERR_NOTSUPP = 10004, /* v3 */
+ NFSERR_TOOSMALL = 10005, /* v3 */
+ NFSERR_SERVERFAULT = 10006, /* v3 */
+ NFSERR_BADTYPE = 10007, /* v3 */
+ NFSERR_JUKEBOX = 10008 /* v3 */
+};
+
+#define NFS_PROGRAM 100003
+
+
+
+#ifndef NFS_FHSIZE
+static const int NFS_FHSIZE = 32;
+#endif
+#ifndef NFS_PORT
+static const int NFS_PORT = 2049;
+#endif
+
+/* Disable the nls stuff */
+# undef bindtextdomain
+# define bindtextdomain(Domain, Directory) /* empty */
+# undef textdomain
+# define textdomain(Domain) /* empty */
+# define _(Text) (Text)
+# define N_(Text) (Text)
+
+static const int MS_MGC_VAL = 0xc0ed0000; /* Magic number indicatng "new" flags */
+static const int MS_RDONLY = 1; /* Mount read-only */
+static const int MS_NOSUID = 2; /* Ignore suid and sgid bits */
+static const int MS_NODEV = 4; /* Disallow access to device special files */
+static const int MS_NOEXEC = 8; /* Disallow program execution */
+static const int MS_SYNCHRONOUS = 16; /* Writes are synced at once */
+static const int MS_REMOUNT = 32; /* Alter flags of a mounted FS */
+static const int MS_MANDLOCK = 64; /* Allow mandatory locks on an FS */
+static const int S_QUOTA = 128; /* Quota initialized for file/directory/symlink */
+static const int S_APPEND = 256; /* Append-only file */
+static const int S_IMMUTABLE = 512; /* Immutable file */
+static const int MS_NOATIME = 1024; /* Do not update access times. */
+static const int MS_NODIRATIME = 2048; /* Do not update directory access times */
+
+
+/*
+ * We want to be able to compile mount on old kernels in such a way
+ * that the binary will work well on more recent kernels.
+ * Thus, if necessary we teach nfsmount.c the structure of new fields
+ * that will come later.
+ *
+ * Moreover, the new kernel includes conflict with glibc includes
+ * so it is easiest to ignore the kernel altogether (at compile time).
+ */
+
+/* NOTE: Do not make this into a 'static const int' because the pre-processor
+ * needs to test this value in some #if statements. */
+#define NFS_MOUNT_VERSION 4
+
+struct nfs2_fh {
+ char data[32];
+};
+struct nfs3_fh {
+ unsigned short size;
+ unsigned char data[64];
+};
+
+struct nfs_mount_data {
+ int version; /* 1 */
+ int fd; /* 1 */
+ struct nfs2_fh old_root; /* 1 */
+ int flags; /* 1 */
+ int rsize; /* 1 */
+ int wsize; /* 1 */
+ int timeo; /* 1 */
+ int retrans; /* 1 */
+ int acregmin; /* 1 */
+ int acregmax; /* 1 */
+ int acdirmin; /* 1 */
+ int acdirmax; /* 1 */
+ struct sockaddr_in addr; /* 1 */
+ char hostname[256]; /* 1 */
+ int namlen; /* 2 */
+ unsigned int bsize; /* 3 */
+ struct nfs3_fh root; /* 4 */
+};
+
+/* bits in the flags field */
+
+static const int NFS_MOUNT_SOFT = 0x0001; /* 1 */
+static const int NFS_MOUNT_INTR = 0x0002; /* 1 */
+static const int NFS_MOUNT_SECURE = 0x0004; /* 1 */
+static const int NFS_MOUNT_POSIX = 0x0008; /* 1 */
+static const int NFS_MOUNT_NOCTO = 0x0010; /* 1 */
+static const int NFS_MOUNT_NOAC = 0x0020; /* 1 */
+static const int NFS_MOUNT_TCP = 0x0040; /* 2 */
+static const int NFS_MOUNT_VER3 = 0x0080; /* 3 */
+static const int NFS_MOUNT_KERBEROS = 0x0100; /* 3 */
+static const int NFS_MOUNT_NONLM = 0x0200; /* 3 */
+
+
+#define UTIL_LINUX_VERSION "2.10m"
+#define util_linux_version "util-linux-2.10m"
+
+#define HAVE_inet_aton
+#define HAVE_scsi_h
+#define HAVE_blkpg_h
+#define HAVE_kd_h
+#define HAVE_termcap
+#define HAVE_locale_h
+#define HAVE_libintl_h
+#define ENABLE_NLS
+#define HAVE_langinfo_h
+#define HAVE_progname
+#define HAVE_openpty
+#define HAVE_nanosleep
+#define HAVE_personality
+#define HAVE_tm_gmtoff
+
+static char *nfs_strerror(int status);
+
+#define MAKE_VERSION(p,q,r) (65536*(p) + 256*(q) + (r))
+#define MAX_NFSPROT ((nfs_mount_version >= 4) ? 3 : 2)
+
+static const int EX_FAIL = 32; /* mount failure */
+static const int EX_BG = 256; /* retry in background (internal only) */
+
+
+/*
+ * nfs_mount_version according to the sources seen at compile time.
+ */
+static int nfs_mount_version;
+
+/*
+ * Unfortunately, the kernel prints annoying console messages
+ * in case of an unexpected nfs mount version (instead of
+ * just returning some error). Therefore we'll have to try
+ * and figure out what version the kernel expects.
+ *
+ * Variables:
+ * KERNEL_NFS_MOUNT_VERSION: kernel sources at compile time
+ * NFS_MOUNT_VERSION: these nfsmount sources at compile time
+ * nfs_mount_version: version this source and running kernel can handle
+ */
+static void
+find_kernel_nfs_mount_version(void)
+{
+ static int kernel_version = 0;
+
+ if (kernel_version)
+ return;
+
+ nfs_mount_version = NFS_MOUNT_VERSION; /* default */
+
+ kernel_version = get_kernel_revision();
+ if (kernel_version) {
+ if (kernel_version < MAKE_VERSION(2,1,32))
+ nfs_mount_version = 1;
+ else if (kernel_version < MAKE_VERSION(2,2,18) ||
+ (kernel_version >= MAKE_VERSION(2,3,0) &&
+ kernel_version < MAKE_VERSION(2,3,99)))
+ nfs_mount_version = 3;
+ else
+ nfs_mount_version = 4; /* since 2.3.99pre4 */
+ }
+ if (nfs_mount_version > NFS_MOUNT_VERSION)
+ nfs_mount_version = NFS_MOUNT_VERSION;
+}
+
+static struct pmap *
+get_mountport(struct sockaddr_in *server_addr,
+ long unsigned prog,
+ long unsigned version,
+ long unsigned proto,
+ long unsigned port)
+{
+struct pmaplist *pmap;
+static struct pmap p = {0, 0, 0, 0};
+
+server_addr->sin_port = PMAPPORT;
+pmap = pmap_getmaps(server_addr);
+
+if (version > MAX_NFSPROT)
+ version = MAX_NFSPROT;
+if (!prog)
+ prog = MOUNTPROG;
+p.pm_prog = prog;
+p.pm_vers = version;
+p.pm_prot = proto;
+p.pm_port = port;
+
+while (pmap) {
+ if (pmap->pml_map.pm_prog != prog)
+ goto next;
+ if (!version && p.pm_vers > pmap->pml_map.pm_vers)
+ goto next;
+ if (version > 2 && pmap->pml_map.pm_vers != version)
+ goto next;
+ if (version && version <= 2 && pmap->pml_map.pm_vers > 2)
+ goto next;
+ if (pmap->pml_map.pm_vers > MAX_NFSPROT ||
+ (proto && p.pm_prot && pmap->pml_map.pm_prot != proto) ||
+ (port && pmap->pml_map.pm_port != port))
+ goto next;
+ memcpy(&p, &pmap->pml_map, sizeof(p));
+next:
+ pmap = pmap->pml_next;
+}
+if (!p.pm_vers)
+ p.pm_vers = MOUNTVERS;
+if (!p.pm_port)
+ p.pm_port = MOUNTPORT;
+if (!p.pm_prot)
+ p.pm_prot = IPPROTO_TCP;
+return &p;
+}
+
+int nfsmount(const char *spec, const char *node, int *flags,
+ char **extra_opts, char **mount_opts, int running_bg)
+{
+ static char *prev_bg_host;
+ char hostdir[1024];
+ CLIENT *mclient;
+ char *hostname;
+ char *pathname;
+ char *old_opts;
+ char *mounthost=NULL;
+ char new_opts[1024];
+ struct timeval total_timeout;
+ enum clnt_stat clnt_stat;
+ struct nfs_mount_data data;
+ char *opt, *opteq;
+ int val;
+ struct hostent *hp;
+ struct sockaddr_in server_addr;
+ struct sockaddr_in mount_server_addr;
+ struct pmap* pm_mnt;
+ int msock, fsock;
+ struct timeval retry_timeout;
+ union {
+ struct fhstatus nfsv2;
+ struct mountres3 nfsv3;
+ } status;
+ struct stat statbuf;
+ char *s;
+ int port;
+ int mountport;
+ int proto;
+ int bg;
+ int soft;
+ int intr;
+ int posix;
+ int nocto;
+ int noac;
+ int nolock;
+ int retry;
+ int tcp;
+ int mountprog;
+ int mountvers;
+ int nfsprog;
+ int nfsvers;
+ int retval;
+ time_t t;
+ time_t prevt;
+ time_t timeout;
+
+ find_kernel_nfs_mount_version();
+
+ retval = EX_FAIL;
+ msock = fsock = -1;
+ mclient = NULL;
+ if (strlen(spec) >= sizeof(hostdir)) {
+ bb_error_msg("excessively long host:dir argument");
+ goto fail;
+ }
+ strcpy(hostdir, spec);
+ if ((s = strchr(hostdir, ':'))) {
+ hostname = hostdir;
+ pathname = s + 1;
+ *s = '\0';
+ /* Ignore all but first hostname in replicated mounts
+ until they can be fully supported. (mack@sgi.com) */
+ if ((s = strchr(hostdir, ','))) {
+ *s = '\0';
+ bb_error_msg("warning: multiple hostnames not supported");
+ }
+ } else {
+ bb_error_msg("directory to mount not in host:dir format");
+ goto fail;
+ }
+
+ server_addr.sin_family = AF_INET;
+#ifdef HAVE_inet_aton
+ if (!inet_aton(hostname, &server_addr.sin_addr))
+#endif
+ {
+ if ((hp = gethostbyname(hostname)) == NULL) {
+ bb_herror_msg("%s", hostname);
+ goto fail;
+ } else {
+ if (hp->h_length > sizeof(struct in_addr)) {
+ bb_error_msg("got bad hp->h_length");
+ hp->h_length = sizeof(struct in_addr);
+ }
+ memcpy(&server_addr.sin_addr,
+ hp->h_addr, hp->h_length);
+ }
+ }
+
+ memcpy (&mount_server_addr, &server_addr, sizeof (mount_server_addr));
+
+ /* add IP address to mtab options for use when unmounting */
+
+ s = inet_ntoa(server_addr.sin_addr);
+ old_opts = *extra_opts;
+ if (!old_opts)
+ old_opts = "";
+ if (strlen(old_opts) + strlen(s) + 10 >= sizeof(new_opts)) {
+ bb_error_msg("excessively long option argument");
+ goto fail;
+ }
+ sprintf(new_opts, "%s%saddr=%s",
+ old_opts, *old_opts ? "," : "", s);
+ *extra_opts = bb_xstrdup(new_opts);
+
+ /* Set default options.
+ * rsize/wsize (and bsize, for ver >= 3) are left 0 in order to
+ * let the kernel decide.
+ * timeo is filled in after we know whether it'll be TCP or UDP. */
+ memset(&data, 0, sizeof(data));
+ data.retrans = 3;
+ data.acregmin = 3;
+ data.acregmax = 60;
+ data.acdirmin = 30;
+ data.acdirmax = 60;
+#if NFS_MOUNT_VERSION >= 2
+ data.namlen = NAME_MAX;
+#endif
+
+ bg = 0;
+ soft = 0;
+ intr = 0;
+ posix = 0;
+ nocto = 0;
+ nolock = 0;
+ noac = 0;
+ retry = 10000; /* 10000 minutes ~ 1 week */
+ tcp = 0;
+
+ mountprog = MOUNTPROG;
+ mountvers = 0;
+ port = 0;
+ mountport = 0;
+ nfsprog = NFS_PROGRAM;
+ nfsvers = 0;
+
+ /* parse options */
+
+ for (opt = strtok(old_opts, ","); opt; opt = strtok(NULL, ",")) {
+ if ((opteq = strchr(opt, '='))) {
+ val = atoi(opteq + 1);
+ *opteq = '\0';
+ if (!strcmp(opt, "rsize"))
+ data.rsize = val;
+ else if (!strcmp(opt, "wsize"))
+ data.wsize = val;
+ else if (!strcmp(opt, "timeo"))
+ data.timeo = val;
+ else if (!strcmp(opt, "retrans"))
+ data.retrans = val;
+ else if (!strcmp(opt, "acregmin"))
+ data.acregmin = val;
+ else if (!strcmp(opt, "acregmax"))
+ data.acregmax = val;
+ else if (!strcmp(opt, "acdirmin"))
+ data.acdirmin = val;
+ else if (!strcmp(opt, "acdirmax"))
+ data.acdirmax = val;
+ else if (!strcmp(opt, "actimeo")) {
+ data.acregmin = val;
+ data.acregmax = val;
+ data.acdirmin = val;
+ data.acdirmax = val;
+ }
+ else if (!strcmp(opt, "retry"))
+ retry = val;
+ else if (!strcmp(opt, "port"))
+ port = val;
+ else if (!strcmp(opt, "mountport"))
+ mountport = val;
+ else if (!strcmp(opt, "mounthost"))
+ mounthost=bb_xstrndup(opteq+1,
+ strcspn(opteq+1," \t\n\r,"));
+ else if (!strcmp(opt, "mountprog"))
+ mountprog = val;
+ else if (!strcmp(opt, "mountvers"))
+ mountvers = val;
+ else if (!strcmp(opt, "nfsprog"))
+ nfsprog = val;
+ else if (!strcmp(opt, "nfsvers") ||
+ !strcmp(opt, "vers"))
+ nfsvers = val;
+ else if (!strcmp(opt, "proto")) {
+ if (!strncmp(opteq+1, "tcp", 3))
+ tcp = 1;
+ else if (!strncmp(opteq+1, "udp", 3))
+ tcp = 0;
+ else
+ printf(_("Warning: Unrecognized proto= option.\n"));
+ } else if (!strcmp(opt, "namlen")) {
+#if NFS_MOUNT_VERSION >= 2
+ if (nfs_mount_version >= 2)
+ data.namlen = val;
+ else
+#endif
+ printf(_("Warning: Option namlen is not supported.\n"));
+ } else if (!strcmp(opt, "addr"))
+ /* ignore */;
+ else {
+ printf(_("unknown nfs mount parameter: "
+ "%s=%d\n"), opt, val);
+ goto fail;
+ }
+ }
+ else {
+ val = 1;
+ if (!strncmp(opt, "no", 2)) {
+ val = 0;
+ opt += 2;
+ }
+ if (!strcmp(opt, "bg"))
+ bg = val;
+ else if (!strcmp(opt, "fg"))
+ bg = !val;
+ else if (!strcmp(opt, "soft"))
+ soft = val;
+ else if (!strcmp(opt, "hard"))
+ soft = !val;
+ else if (!strcmp(opt, "intr"))
+ intr = val;
+ else if (!strcmp(opt, "posix"))
+ posix = val;
+ else if (!strcmp(opt, "cto"))
+ nocto = !val;
+ else if (!strcmp(opt, "ac"))
+ noac = !val;
+ else if (!strcmp(opt, "tcp"))
+ tcp = val;
+ else if (!strcmp(opt, "udp"))
+ tcp = !val;
+ else if (!strcmp(opt, "lock")) {
+ if (nfs_mount_version >= 3)
+ nolock = !val;
+ else
+ printf(_("Warning: option nolock is not supported.\n"));
+ } else {
+ printf(_("unknown nfs mount option: "
+ "%s%s\n"), val ? "" : "no", opt);
+ goto fail;
+ }
+ }
+ }
+ proto = (tcp) ? IPPROTO_TCP : IPPROTO_UDP;
+
+ data.flags = (soft ? NFS_MOUNT_SOFT : 0)
+ | (intr ? NFS_MOUNT_INTR : 0)
+ | (posix ? NFS_MOUNT_POSIX : 0)
+ | (nocto ? NFS_MOUNT_NOCTO : 0)
+ | (noac ? NFS_MOUNT_NOAC : 0);
+#if NFS_MOUNT_VERSION >= 2
+ if (nfs_mount_version >= 2)
+ data.flags |= (tcp ? NFS_MOUNT_TCP : 0);
+#endif
+#if NFS_MOUNT_VERSION >= 3
+ if (nfs_mount_version >= 3)
+ data.flags |= (nolock ? NFS_MOUNT_NONLM : 0);
+#endif
+ if (nfsvers > MAX_NFSPROT) {
+ bb_error_msg("NFSv%d not supported!", nfsvers);
+ return 0;
+ }
+ if (mountvers > MAX_NFSPROT) {
+ bb_error_msg("NFSv%d not supported!", nfsvers);
+ return 0;
+ }
+ if (nfsvers && !mountvers)
+ mountvers = (nfsvers < 3) ? 1 : nfsvers;
+ if (nfsvers && nfsvers < mountvers) {
+ mountvers = nfsvers;
+ }
+
+ /* Adjust options if none specified */
+ if (!data.timeo)
+ data.timeo = tcp ? 70 : 7;
+
+#ifdef NFS_MOUNT_DEBUG
+ printf("rsize = %d, wsize = %d, timeo = %d, retrans = %d\n",
+ data.rsize, data.wsize, data.timeo, data.retrans);
+ printf("acreg (min, max) = (%d, %d), acdir (min, max) = (%d, %d)\n",
+ data.acregmin, data.acregmax, data.acdirmin, data.acdirmax);
+ printf("port = %d, bg = %d, retry = %d, flags = %.8x\n",
+ port, bg, retry, data.flags);
+ printf("mountprog = %d, mountvers = %d, nfsprog = %d, nfsvers = %d\n",
+ mountprog, mountvers, nfsprog, nfsvers);
+ printf("soft = %d, intr = %d, posix = %d, nocto = %d, noac = %d\n",
+ (data.flags & NFS_MOUNT_SOFT) != 0,
+ (data.flags & NFS_MOUNT_INTR) != 0,
+ (data.flags & NFS_MOUNT_POSIX) != 0,
+ (data.flags & NFS_MOUNT_NOCTO) != 0,
+ (data.flags & NFS_MOUNT_NOAC) != 0);
+#if NFS_MOUNT_VERSION >= 2
+ printf("tcp = %d\n",
+ (data.flags & NFS_MOUNT_TCP) != 0);
+#endif
+#endif
+
+ data.version = nfs_mount_version;
+
+ if (*flags & MS_REMOUNT)
+ goto copy_data_and_return;
+
+ /*
+ * If the previous mount operation on the same host was
+ * backgrounded, and the "bg" for this mount is also set,
+ * give up immediately, to avoid the initial timeout.
+ */
+ if (bg && !running_bg &&
+ prev_bg_host && strcmp(hostname, prev_bg_host) == 0) {
+ if (retry > 0)
+ retval = EX_BG;
+ return retval;
+ }
+
+ /* create mount deamon client */
+ /* See if the nfs host = mount host. */
+ if (mounthost) {
+ if (mounthost[0] >= '0' && mounthost[0] <= '9') {
+ mount_server_addr.sin_family = AF_INET;
+ mount_server_addr.sin_addr.s_addr = inet_addr(hostname);
+ } else {
+ if ((hp = gethostbyname(mounthost)) == NULL) {
+ bb_herror_msg("%s", mounthost);
+ goto fail;
+ } else {
+ if (hp->h_length > sizeof(struct in_addr)) {
+ bb_error_msg("got bad hp->h_length?");
+ hp->h_length = sizeof(struct in_addr);
+ }
+ mount_server_addr.sin_family = AF_INET;
+ memcpy(&mount_server_addr.sin_addr,
+ hp->h_addr, hp->h_length);
+ }
+ }
+ }
+
+ /*
+ * The following loop implements the mount retries. On the first
+ * call, "running_bg" is 0. When the mount times out, and the
+ * "bg" option is set, the exit status EX_BG will be returned.
+ * For a backgrounded mount, there will be a second call by the
+ * child process with "running_bg" set to 1.
+ *
+ * The case where the mount point is not present and the "bg"
+ * option is set, is treated as a timeout. This is done to
+ * support nested mounts.
+ *
+ * The "retry" count specified by the user is the number of
+ * minutes to retry before giving up.
+ *
+ * Only the first error message will be displayed.
+ */
+ retry_timeout.tv_sec = 3;
+ retry_timeout.tv_usec = 0;
+ total_timeout.tv_sec = 20;
+ total_timeout.tv_usec = 0;
+ timeout = time(NULL) + 60 * retry;
+ prevt = 0;
+ t = 30;
+ val = 1;
+ for (;;) {
+ if (bg && stat(node, &statbuf) == -1) {
+ if (running_bg) {
+ sleep(val); /* 1, 2, 4, 8, 16, 30, ... */
+ val *= 2;
+ if (val > 30)
+ val = 30;
+ }
+ } else {
+ /* be careful not to use too many CPU cycles */
+ if (t - prevt < 30)
+ sleep(30);
+
+ pm_mnt = get_mountport(&mount_server_addr,
+ mountprog,
+ mountvers,
+ proto,
+ mountport);
+
+ /* contact the mount daemon via TCP */
+ mount_server_addr.sin_port = htons(pm_mnt->pm_port);
+ msock = RPC_ANYSOCK;
+
+ switch (pm_mnt->pm_prot) {
+ case IPPROTO_UDP:
+ mclient = clntudp_create(&mount_server_addr,
+ pm_mnt->pm_prog,
+ pm_mnt->pm_vers,
+ retry_timeout,
+ &msock);
+ if (mclient)
+ break;
+ mount_server_addr.sin_port = htons(pm_mnt->pm_port);
+ msock = RPC_ANYSOCK;
+ case IPPROTO_TCP:
+ mclient = clnttcp_create(&mount_server_addr,
+ pm_mnt->pm_prog,
+ pm_mnt->pm_vers,
+ &msock, 0, 0);
+ break;
+ default:
+ mclient = 0;
+ }
+ if (mclient) {
+ /* try to mount hostname:pathname */
+ mclient->cl_auth = authunix_create_default();
+
+ /* make pointers in xdr_mountres3 NULL so
+ * that xdr_array allocates memory for us
+ */
+ memset(&status, 0, sizeof(status));
+
+ if (pm_mnt->pm_vers == 3)
+ clnt_stat = clnt_call(mclient, MOUNTPROC3_MNT,
+ (xdrproc_t) xdr_dirpath,
+ (caddr_t) &pathname,
+ (xdrproc_t) xdr_mountres3,
+ (caddr_t) &status,
+ total_timeout);
+ else
+ clnt_stat = clnt_call(mclient, MOUNTPROC_MNT,
+ (xdrproc_t) xdr_dirpath,
+ (caddr_t) &pathname,
+ (xdrproc_t) xdr_fhstatus,
+ (caddr_t) &status,
+ total_timeout);
+
+ if (clnt_stat == RPC_SUCCESS)
+ break; /* we're done */
+ if (errno != ECONNREFUSED) {
+ clnt_perror(mclient, "mount");
+ goto fail; /* don't retry */
+ }
+ if (!running_bg && prevt == 0)
+ clnt_perror(mclient, "mount");
+ auth_destroy(mclient->cl_auth);
+ clnt_destroy(mclient);
+ mclient = 0;
+ close(msock);
+ } else {
+ if (!running_bg && prevt == 0)
+ clnt_pcreateerror("mount");
+ }
+ prevt = t;
+ }
+ if (!bg)
+ goto fail;
+ if (!running_bg) {
+ prev_bg_host = bb_xstrdup(hostname);
+ if (retry > 0)
+ retval = EX_BG;
+ goto fail;
+ }
+ t = time(NULL);
+ if (t >= timeout)
+ goto fail;
+ }
+ nfsvers = (pm_mnt->pm_vers < 2) ? 2 : pm_mnt->pm_vers;
+
+ if (nfsvers == 2) {
+ if (status.nfsv2.fhs_status != 0) {
+ bb_error_msg("%s:%s failed, reason given by server: %s",
+ hostname, pathname,
+ nfs_strerror(status.nfsv2.fhs_status));
+ goto fail;
+ }
+ memcpy(data.root.data,
+ (char *) status.nfsv2.fhstatus_u.fhs_fhandle,
+ NFS_FHSIZE);
+#if NFS_MOUNT_VERSION >= 4
+ data.root.size = NFS_FHSIZE;
+ memcpy(data.old_root.data,
+ (char *) status.nfsv2.fhstatus_u.fhs_fhandle,
+ NFS_FHSIZE);
+#endif
+ } else {
+#if NFS_MOUNT_VERSION >= 4
+ fhandle3 *my_fhandle;
+ if (status.nfsv3.fhs_status != 0) {
+ bb_error_msg("%s:%s failed, reason given by server: %s",
+ hostname, pathname,
+ nfs_strerror(status.nfsv3.fhs_status));
+ goto fail;
+ }
+ my_fhandle = &status.nfsv3.mountres3_u.mountinfo.fhandle;
+ memset(data.old_root.data, 0, NFS_FHSIZE);
+ memset(&data.root, 0, sizeof(data.root));
+ data.root.size = my_fhandle->fhandle3_len;
+ memcpy(data.root.data,
+ (char *) my_fhandle->fhandle3_val,
+ my_fhandle->fhandle3_len);
+
+ data.flags |= NFS_MOUNT_VER3;
+#endif
+ }
+
+ /* create nfs socket for kernel */
+
+ if (tcp) {
+ if (nfs_mount_version < 3) {
+ printf(_("NFS over TCP is not supported.\n"));
+ goto fail;
+ }
+ fsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
+ } else
+ fsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+ if (fsock < 0) {
+ perror(_("nfs socket"));
+ goto fail;
+ }
+ if (bindresvport(fsock, 0) < 0) {
+ perror(_("nfs bindresvport"));
+ goto fail;
+ }
+ if (port == 0) {
+ server_addr.sin_port = PMAPPORT;
+ port = pmap_getport(&server_addr, nfsprog, nfsvers,
+ tcp ? IPPROTO_TCP : IPPROTO_UDP);
+ if (port == 0)
+ port = NFS_PORT;
+#ifdef NFS_MOUNT_DEBUG
+ else
+ printf(_("used portmapper to find NFS port\n"));
+#endif
+ }
+#ifdef NFS_MOUNT_DEBUG
+ printf(_("using port %d for nfs deamon\n"), port);
+#endif
+ server_addr.sin_port = htons(port);
+ /*
+ * connect() the socket for kernels 1.3.10 and below only,
+ * to avoid problems with multihomed hosts.
+ * --Swen
+ */
+ if (get_kernel_revision() <= 66314
+ && connect(fsock, (struct sockaddr *) &server_addr,
+ sizeof (server_addr)) < 0) {
+ perror(_("nfs connect"));
+ goto fail;
+ }
+
+ /* prepare data structure for kernel */
+
+ data.fd = fsock;
+ memcpy((char *) &data.addr, (char *) &server_addr, sizeof(data.addr));
+ strncpy(data.hostname, hostname, sizeof(data.hostname));
+
+ /* clean up */
+
+ auth_destroy(mclient->cl_auth);
+ clnt_destroy(mclient);
+ close(msock);
+copy_data_and_return:
+ *mount_opts = xrealloc(*mount_opts, sizeof(data));
+ memcpy(*mount_opts, &data, sizeof(data));
+ return 0;
+
+ /* abort */
+
+fail:
+ if (msock != -1) {
+ if (mclient) {
+ auth_destroy(mclient->cl_auth);
+ clnt_destroy(mclient);
+ }
+ close(msock);
+ }
+ if (fsock != -1)
+ close(fsock);
+ return retval;
+}
+
+/*
+ * We need to translate between nfs status return values and
+ * the local errno values which may not be the same.
+ *
+ * Andreas Schwab <schwab@LS5.informatik.uni-dortmund.de>: change errno:
+ * "after #include <errno.h> the symbol errno is reserved for any use,
+ * it cannot even be used as a struct tag or field name".
+ */
+
+#ifndef EDQUOT
+#define EDQUOT ENOSPC
+#endif
+
+static struct {
+ enum nfs_stat stat;
+ int errnum;
+} nfs_errtbl[] = {
+ { NFS_OK, 0 },
+ { NFSERR_PERM, EPERM },
+ { NFSERR_NOENT, ENOENT },
+ { NFSERR_IO, EIO },
+ { NFSERR_NXIO, ENXIO },
+ { NFSERR_ACCES, EACCES },
+ { NFSERR_EXIST, EEXIST },
+ { NFSERR_NODEV, ENODEV },
+ { NFSERR_NOTDIR, ENOTDIR },
+ { NFSERR_ISDIR, EISDIR },
+#ifdef NFSERR_INVAL
+ { NFSERR_INVAL, EINVAL }, /* that Sun forgot */
+#endif
+ { NFSERR_FBIG, EFBIG },
+ { NFSERR_NOSPC, ENOSPC },
+ { NFSERR_ROFS, EROFS },
+ { NFSERR_NAMETOOLONG, ENAMETOOLONG },
+ { NFSERR_NOTEMPTY, ENOTEMPTY },
+ { NFSERR_DQUOT, EDQUOT },
+ { NFSERR_STALE, ESTALE },
+#ifdef EWFLUSH
+ { NFSERR_WFLUSH, EWFLUSH },
+#endif
+ /* Throw in some NFSv3 values for even more fun (HP returns these) */
+ { 71, EREMOTE },
+
+ { -1, EIO }
+};
+
+static char *nfs_strerror(int status)
+{
+ int i;
+ static char buf[256];
+
+ for (i = 0; nfs_errtbl[i].stat != -1; i++) {
+ if (nfs_errtbl[i].stat == status)
+ return strerror(nfs_errtbl[i].errnum);
+ }
+ sprintf(buf, _("unknown nfs status return value: %d"), status);
+ return buf;
+}
+
+static bool_t
+xdr_fhandle (XDR *xdrs, fhandle objp)
+{
+ //register int32_t *buf;
+
+ if (!xdr_opaque (xdrs, objp, FHSIZE))
+ return FALSE;
+ return TRUE;
+}
+
+bool_t
+xdr_fhstatus (XDR *xdrs, fhstatus *objp)
+{
+ //register int32_t *buf;
+
+ if (!xdr_u_int (xdrs, &objp->fhs_status))
+ return FALSE;
+ switch (objp->fhs_status) {
+ case 0:
+ if (!xdr_fhandle (xdrs, objp->fhstatus_u.fhs_fhandle))
+ return FALSE;
+ break;
+ default:
+ break;
+ }
+ return TRUE;
+}
+
+bool_t
+xdr_dirpath (XDR *xdrs, dirpath *objp)
+{
+ //register int32_t *buf;
+
+ if (!xdr_string (xdrs, objp, MNTPATHLEN))
+ return FALSE;
+ return TRUE;
+}
+
+bool_t
+xdr_fhandle3 (XDR *xdrs, fhandle3 *objp)
+{
+ //register int32_t *buf;
+
+ if (!xdr_bytes (xdrs, (char **)&objp->fhandle3_val, (unsigned int *) &objp->fhandle3_len, FHSIZE3))
+ return FALSE;
+ return TRUE;
+}
+
+bool_t
+xdr_mountres3_ok (XDR *xdrs, mountres3_ok *objp)
+{
+ //register int32_t *buf;
+
+ if (!xdr_fhandle3 (xdrs, &objp->fhandle))
+ return FALSE;
+ if (!xdr_array (xdrs, (char **)&objp->auth_flavours.auth_flavours_val, (unsigned int *) &objp->auth_flavours.auth_flavours_len, ~0,
+ sizeof (int), (xdrproc_t) xdr_int))
+ return FALSE;
+ return TRUE;
+}
+
+bool_t
+xdr_mountstat3 (XDR *xdrs, mountstat3 *objp)
+{
+ //register int32_t *buf;
+
+ if (!xdr_enum (xdrs, (enum_t *) objp))
+ return FALSE;
+ return TRUE;
+}
+
+bool_t
+xdr_mountres3 (XDR *xdrs, mountres3 *objp)
+{
+ //register int32_t *buf;
+
+ if (!xdr_mountstat3 (xdrs, &objp->fhs_status))
+ return FALSE;
+ switch (objp->fhs_status) {
+ case MNT_OK:
+ if (!xdr_mountres3_ok (xdrs, &objp->mountres3_u.mountinfo))
+ return FALSE;
+ break;
+ default:
+ break;
+ }
+ return TRUE;
+}
+
generated by cgit v1.1 at 2025-04-10 16:14:02 +0000