/* $NetBSD: mount_fs.c,v 1.3 2015/01/17 17:46:31 christos Exp $ */

/* $NetBSD: mount_fs.c,v 1.3 2015/01/17 17:46:31 christos Exp $ */

/*
* Copyright (c) 1997-2014 Erez Zadok
* Copyright (c) 1990 Jan-Simon Pendry
* Copyright (c) 1990 Imperial College of Science, Technology & Medicine
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Jan-Simon Pendry at Imperial College, London.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*
* File: am-utils/libamu/mount_fs.c
*
*/

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <am_defs.h>
#include <amu.h>
#include <nfs_common.h>

/* ensure that mount table options are delimited by a comma */
#define append_opts(old, l, new) { \
if (*(old) != '\0') \
xstrlcat(old, ",", l); \
xstrlcat(old, new, l); }

/*
* Standard mount flags
*/
struct opt_tab mnt_flags[] =
{
#if defined(MNT2_GEN_OPT_RDONLY) && defined(MNTTAB_OPT_RO)
{MNTTAB_OPT_RO, MNT2_GEN_OPT_RDONLY},
#endif /* defined(MNT2_GEN_OPT_RDONLY) && defined(MNTTAB_OPT_RO) */

#if defined(MNT2_GEN_OPT_NOCACHE) && defined(MNTTAB_OPT_NOCACHE)
{MNTTAB_OPT_NOCACHE, MNT2_GEN_OPT_NOCACHE},
#endif /* defined(MNT2_GEN_OPT_NOCACHE) && defined(MNTTAB_OPT_NOCACHE) */

/* the "grpid" mount option can be offered as generic of NFS */
#ifdef MNTTAB_OPT_GRPID
# ifdef MNT2_GEN_OPT_GRPID
{MNTTAB_OPT_GRPID, MNT2_GEN_OPT_GRPID},
# endif /* MNT2_GEN_OPT_GRPID */
# ifdef MNT2_NFS_OPT_GRPID
{MNTTAB_OPT_GRPID, MNT2_NFS_OPT_GRPID},
# endif /* MNT2_NFS_OPT_GRPID */
#endif /* MNTTAB_OPT_GRPID */

#if defined(MNT2_GEN_OPT_MULTI) && defined(MNTTAB_OPT_MULTI)
{MNTTAB_OPT_MULTI, MNT2_GEN_OPT_MULTI},
#endif /* defined(MNT2_GEN_OPT_MULTI) && defined(MNTTAB_OPT_MULTI) */

#if defined(MNT2_GEN_OPT_NODEV) && defined(MNTTAB_OPT_NODEV)
{MNTTAB_OPT_NODEV, MNT2_GEN_OPT_NODEV},
#endif /* defined(MNT2_GEN_OPT_NODEV) && defined(MNTTAB_OPT_NODEV) */

#if defined(MNT2_GEN_OPT_NOEXEC) && defined(MNTTAB_OPT_NOEXEC)
{MNTTAB_OPT_NOEXEC, MNT2_GEN_OPT_NOEXEC},
#endif /* defined(MNT2_GEN_OPT_NOEXEC) && defined(MNTTAB_OPT_NOEXEC) */

#if defined(MNT2_GEN_OPT_NOSUB) && defined(MNTTAB_OPT_NOSUB)
{MNTTAB_OPT_NOSUB, MNT2_GEN_OPT_NOSUB},
#endif /* defined(MNT2_GEN_OPT_NOSUB) && defined(MNTTAB_OPT_NOSUB) */

#if defined(MNT2_GEN_OPT_NOSUID) && defined(MNTTAB_OPT_NOSUID)
{MNTTAB_OPT_NOSUID, MNT2_GEN_OPT_NOSUID},
#endif /* defined(MNT2_GEN_OPT_NOSUID) && defined(MNTTAB_OPT_NOSUID) */

#if defined(MNT2_GEN_OPT_SYNC) && defined(MNTTAB_OPT_SYNC)
{MNTTAB_OPT_SYNC, MNT2_GEN_OPT_SYNC},
#endif /* defined(MNT2_GEN_OPT_SYNC) && defined(MNTTAB_OPT_SYNC) */

#if defined(MNT2_GEN_OPT_OVERLAY) && defined(MNTTAB_OPT_OVERLAY)
{MNTTAB_OPT_OVERLAY, MNT2_GEN_OPT_OVERLAY},
#endif /* defined(MNT2_GEN_OPT_OVERLAY) && defined(MNTTAB_OPT_OVERLAY) */

#if defined(MNT2_GEN_OPT_LOG) && defined(MNTTAB_OPT_LOG)
{MNTTAB_OPT_LOG, MNT2_GEN_OPT_LOG},
#endif /* defined(MNT2_GEN_OPT_LOG) && defined(MNTTAB_OPT_LOG) */

#if defined(MNT2_GEN_OPT_NOATIME) && defined(MNTTAB_OPT_NOATIME)
{MNTTAB_OPT_NOATIME, MNT2_GEN_OPT_NOATIME},
#endif /* defined(MNT2_GEN_OPT_NOATIME) && defined(MNTTAB_OPT_NOATIME) */

#if defined(MNT2_GEN_OPT_NODEVMTIME) && defined(MNTTAB_OPT_NODEVMTIME)
{MNTTAB_OPT_NODEVMTIME, MNT2_GEN_OPT_NODEVMTIME},
#endif /* defined(MNT2_GEN_OPT_NODEVMTIME) && defined(MNTTAB_OPT_NODEVMTIME) */

#if defined(MNT2_GEN_OPT_SOFTDEP) && defined(MNTTAB_OPT_SOFTDEP)
{MNTTAB_OPT_SOFTDEP, MNT2_GEN_OPT_SOFTDEP},
#endif /* defined(MNT2_GEN_OPT_SOFTDEP) && defined(MNTTAB_OPT_SOFTDEP) */

#if defined(MNT2_GEN_OPT_SYMPERM) && defined(MNTTAB_OPT_SYMPERM)
{MNTTAB_OPT_SYMPERM, MNT2_GEN_OPT_SYMPERM},
#endif /* defined(MNT2_GEN_OPT_SYMPERM) && defined(MNTTAB_OPT_SYMPERM) */

#if defined(MNT2_GEN_OPT_UNION) && defined(MNTTAB_OPT_UNION)
{MNTTAB_OPT_UNION, MNT2_GEN_OPT_UNION},
#endif /* defined(MNT2_GEN_OPT_UNION) && defined(MNTTAB_OPT_UNION) */

/*
* Do not define MNT2_NFS_OPT_* entries here! This is for generic
* mount(2) options only, not for NFS mount options. If you need to put
* something here, it's probably not the right place: see
* include/am_compat.h.
*/

{0, 0}
};

/* compute generic mount flags */
int
compute_mount_flags(mntent_t *mntp)
{
struct opt_tab *opt;
int flags = 0;

#ifdef MNT2_GEN_OPT_NEWTYPE
flags |= MNT2_GEN_OPT_NEWTYPE;
#endif /* MNT2_GEN_OPT_NEWTYPE */
#ifdef MNT2_GEN_OPT_AUTOMOUNTED
flags |= MNT2_GEN_OPT_AUTOMOUNTED;
#endif /* not MNT2_GEN_OPT_AUTOMOUNTED */

/*
* Crack basic mount options
*/
for (opt = mnt_flags; opt->opt; opt++) {
flags |= amu_hasmntopt(mntp, opt->opt) ? opt->flag : 0;
}

return flags;
}

/* compute generic mount flags for automounter mounts */
int
compute_automounter_mount_flags(mntent_t *mntp)
{
int flags = 0;

#ifdef MNT2_GEN_OPT_IGNORE
flags |= MNT2_GEN_OPT_IGNORE;
#endif /* not MNT2_GEN_OPT_IGNORE */
#ifdef MNT2_GEN_OPT_AUTOMNTFS
flags |= MNT2_GEN_OPT_AUTOMNTFS;
#endif /* not MNT2_GEN_OPT_AUTOMNTFS */

return flags;
}

#if defined(MOUNT_TABLE_ON_FILE) && defined(MNTTAB_OPT_VERS)
/*
* add the extra vers={2,3} field to the mount table,
* unless already specified by user
*/
static void
addvers(char *zopts, size_t l, mntent_t *mnt, u_long have_vers,
u_long want_vers)
{
if (have_vers == want_vers &&
hasmntval(mnt, MNTTAB_OPT_VERS) != want_vers) {
char optsbuf[48];
xsnprintf(optsbuf, sizeof(optsbuf),
"%s=%d", MNTTAB_OPT_VERS, want_vers);
append_opts(zopts, l, optsbuf);
}
}
#endif /* MOUNT_TABLE_ON_FILE && MNTTAB_OPT_VERS */

int
mount_fs(mntent_t *mnt, int flags, caddr_t mnt_data, int retry, MTYPE_TYPE type, u_long nfs_version, const char *nfs_proto, const char *mnttabname, int on_autofs)
{
int error = 0;
#ifdef MOUNT_TABLE_ON_FILE
char *zopts = NULL, *xopts = NULL;
size_t l;
#endif /* MOUNT_TABLE_ON_FILE */
char *mnt_dir = NULL;

#ifdef NEED_AUTOFS_SPACE_HACK
char *old_mnt_dir = NULL;
/* perform space hack */
if (on_autofs) {
old_mnt_dir = mnt->mnt_dir;
mnt->mnt_dir = mnt_dir = autofs_strdup_space_hack(old_mnt_dir);
} else
#endif /* NEED_AUTOFS_SPACE_HACK */
mnt_dir = xstrdup(mnt->mnt_dir);

dlog("'%s' fstype " MTYPE_PRINTF_TYPE " (%s) flags %#x (%s)",
mnt_dir, type, mnt->mnt_type, flags, mnt->mnt_opts);

again:
error = MOUNT_TRAP(type, mnt, flags, mnt_data);

if (error < 0) {
plog(XLOG_ERROR, "'%s': mount: %m", mnt_dir);
/*
* The following code handles conditions which shouldn't
* occur. They are possible either because amd screws up
* in preparing for the mount, or because some human
* messed with the mount point. Both have been known to
* happen. -- stolcke 2/22/95
*/
if (errno == EBUSY) {
/*
* Also, sometimes unmount isn't called, e.g., because
* our mountlist is garbled. This leaves old mount
* points around which need to be removed before we
* can mount something new in their place.
*/
errno = umount_fs(mnt_dir, mnttabname, on_autofs);
if (errno != 0)
plog(XLOG_ERROR, "'%s': umount: %m", mnt_dir);
else {
plog(XLOG_WARNING, "extra umount required for '%s'", mnt_dir);
error = MOUNT_TRAP(type, mnt, flags, mnt_data);
}
}
}

if (error < 0 && --retry > 0) {
sleep(1);
goto again;
}

#ifdef NEED_AUTOFS_SPACE_HACK
/* Undo space hack */
if (on_autofs)
mnt->mnt_dir = old_mnt_dir;
#endif /* NEED_AUTOFS_SPACE_HACK */

if (error < 0) {
error = errno;
goto out;
}

#ifdef MOUNT_TABLE_ON_FILE
/*
* Allocate memory for options:
* dev=..., vers={2,3}, proto={tcp,udp}
*/
l = strlen(mnt->mnt_opts) + 48;
zopts = (char *) xmalloc(l);

/* copy standard options */
xopts = mnt->mnt_opts;

xstrlcpy(zopts, xopts, l);

# ifdef MNTTAB_OPT_DEV
{
/* add the extra dev= field to the mount table */
struct stat stb;
if (lstat(mnt_dir, &stb) == 0) {
char optsbuf[48];
if (sizeof(stb.st_dev) == 2) /* e.g. SunOS 4.1 */
xsnprintf(optsbuf, sizeof(optsbuf), "%s=%04lx",
MNTTAB_OPT_DEV, (u_long) stb.st_dev & 0xffff);
else /* e.g. System Vr4 */
xsnprintf(optsbuf, sizeof(optsbuf), "%s=%08lx",
MNTTAB_OPT_DEV, (u_long) stb.st_dev);
append_opts(zopts, l, optsbuf);
}
}
# endif /* MNTTAB_OPT_DEV */

# if defined(HAVE_FS_NFS4) && defined(MNTTAB_OPT_VERS)
addvers(zopts, l, mnt, nfs_version, NFS_VERSION4);
# endif /* defined(HAVE_FS_NFS4) && defined(MNTTAB_OPT_VERS) */
# if defined(HAVE_FS_NFS3) && defined(MNTTAB_OPT_VERS)
addvers(zopts, l, mnt, nfs_version, NFS_VERSION3);
# endif /* defined(HAVE_FS_NFS3) && defined(MNTTAB_OPT_VERS) */
# ifdef MNTTAB_OPT_VERS
addvers(zopts, l, mnt, nfs_version, NFS_VERSION2);
# endif /* MNTTAB_OPT_VERS */

# ifdef MNTTAB_OPT_PROTO
/*
* add the extra proto={tcp,udp} field to the mount table,
* unless already specified by user.
*/
if (nfs_proto && !amu_hasmntopt(mnt, MNTTAB_OPT_PROTO)) {
char optsbuf[48];
xsnprintf(optsbuf, sizeof(optsbuf), "%s=%s", MNTTAB_OPT_PROTO, nfs_proto);
append_opts(zopts, l, optsbuf);
}
# endif /* MNTTAB_OPT_PROTO */

/* finally, store the options into the mount table structure */
mnt->mnt_opts = zopts;

/*
* Additional fields in mntent_t
* are fixed up here
*/
# ifdef HAVE_MNTENT_T_MNT_CNODE
mnt->mnt_cnode = 0;
# endif /* HAVE_MNTENT_T_MNT_CNODE */

# ifdef HAVE_MNTENT_T_MNT_RO
mnt->mnt_ro = (amu_hasmntopt(mnt, MNTTAB_OPT_RO) != NULL);
# endif /* HAVE_MNTENT_T_MNT_RO */

# ifdef HAVE_MNTENT_T_MNT_TIME
# ifdef HAVE_MNTENT_T_MNT_TIME_STRING
{ /* allocate enough space for a long */
size_t l = 13 * sizeof(char);
char *str = (char *) xmalloc(l);
xsnprintf(str, l, "%ld", time((time_t *) NULL));
mnt->mnt_time = str;
}
# else /* not HAVE_MNTENT_T_MNT_TIME_STRING */
mnt->mnt_time = time((time_t *) NULL);
# endif /* not HAVE_MNTENT_T_MNT_TIME_STRING */
# endif /* HAVE_MNTENT_T_MNT_TIME */

write_mntent(mnt, mnttabname);

# ifdef MNTTAB_OPT_DEV
if (xopts) {
XFREE(mnt->mnt_opts);
mnt->mnt_opts = xopts;
}
# endif /* MNTTAB_OPT_DEV */
#endif /* MOUNT_TABLE_ON_FILE */

out:
XFREE(mnt_dir);
return error;
}

/*
* Compute all NFS attribute cache related flags separately. Note that this
* function now computes attribute-cache flags for both Amd's automount
* points (NFS) as well as any normal NFS mount that Amd performs. Edit
* with caution.
*/
static void
compute_nfs_attrcache_flags(struct nfs_common_args *nap, mntent_t *mntp)
{
int acval = 0;
int err_acval = 1; /* 1 means we found no 'actimeo' value */
#if defined(HAVE_NFS_ARGS_T_ACREGMIN) || defined(HAVE_NFS_ARGS_T_ACREGMAX) || defined(HAVE_NFS_ARGS_T_ACDIRMIN) || defined(HAVE_NFS_ARGS_T_ACDIRMAX)
int err_acrdmm; /* for ac{reg,dir}{min,max} */
#endif /* HAVE_NFS_ARGS_T_AC{REG,DIR}{MIN,MAX} */

/************************************************************************/
/*** ATTRIBUTE CACHES ***/
/************************************************************************/
/*
* acval is set to 0 at the top of the function. If actimeo mount option
* exists and defined in mntopts, then its acval is set to it.
* If the value is non-zero, then we set all attribute cache fields to it.
* If acval is zero, it means it was never defined in mntopts or the
* actimeo mount option does not exist, in which case we check for
* individual mount options per attribute cache.
* Regardless of the value of acval, mount flags are set based directly
* on the values of the attribute caches.
*/
#ifdef MNTTAB_OPT_ACTIMEO
err_acval = hasmntvalerr(mntp, MNTTAB_OPT_ACTIMEO, &acval); /* attr cache timeout (sec) */
#endif /* MNTTAB_OPT_ACTIMEO */

/*** acregmin ***/
#ifdef HAVE_NFS_ARGS_T_ACREGMIN
err_acrdmm = 1; /* 1 means we found no acregmin value */
if (!err_acval) {
nap->acregmin = acval; /* min ac timeout for reg files (sec) */
} else {
# ifdef MNTTAB_OPT_ACREGMIN
int tmp;
err_acrdmm = hasmntvalerr(mntp, MNTTAB_OPT_ACREGMIN, &tmp);
nap->acregmin = tmp;
# else /* not MNTTAB_OPT_ACREGMIN */
nap->acregmin = 0;
# endif /* not MNTTAB_OPT_ACREGMIN */
}
/* set this flag iff we changed acregmin (possibly to zero) */
# ifdef MNT2_NFS_OPT_ACREGMIN
if (!err_acval || !err_acrdmm)
nap->flags |= MNT2_NFS_OPT_ACREGMIN;
# endif /* MNT2_NFS_OPT_ACREGMIN */
#endif /* HAVE_NFS_ARGS_T_ACREGMIN */

/*** acregmax ***/
#ifdef HAVE_NFS_ARGS_T_ACREGMAX
err_acrdmm = 1; /* 1 means we found no acregmax value */
if (!err_acval) {
nap->acregmax = acval; /* max ac timeout for reg files (sec) */
} else {
# ifdef MNTTAB_OPT_ACREGMAX
int tmp;
err_acrdmm = hasmntvalerr(mntp, MNTTAB_OPT_ACREGMAX, &tmp);
nap->acregmax = tmp;
# else /* not MNTTAB_OPT_ACREGMAX */
nap->acregmax = 0;
# endif /* not MNTTAB_OPT_ACREGMAX */
}
/* set this flag iff we changed acregmax (possibly to zero) */
# ifdef MNT2_NFS_OPT_ACREGMAX
if (!err_acval || !err_acrdmm)
nap->flags |= MNT2_NFS_OPT_ACREGMAX;
# endif /* MNT2_NFS_OPT_ACREGMAX */
#endif /* HAVE_NFS_ARGS_T_ACREGMAX */

/*** acdirmin ***/
#ifdef HAVE_NFS_ARGS_T_ACDIRMIN
err_acrdmm = 1; /* 1 means we found no acdirmin value */
if (!err_acval) {
nap->acdirmin = acval; /* min ac timeout for dirs (sec) */
} else {
# ifdef MNTTAB_OPT_ACDIRMIN
int tmp;
err_acrdmm = hasmntvalerr(mntp, MNTTAB_OPT_ACDIRMIN, &tmp);
nap->acdirmin = tmp;
# else /* not MNTTAB_OPT_ACDIRMIN */
nap->acdirmin = 0;
# endif /* not MNTTAB_OPT_ACDIRMIN */
}
/* set this flag iff we changed acdirmin (possibly to zero) */
# ifdef MNT2_NFS_OPT_ACDIRMIN
if (!err_acval || !err_acrdmm)
nap->flags |= MNT2_NFS_OPT_ACDIRMIN;
# endif /* MNT2_NFS_OPT_ACDIRMIN */
#endif /* HAVE_NFS_ARGS_T_ACDIRMIN */

/*** acdirmax ***/
#ifdef HAVE_NFS_ARGS_T_ACDIRMAX
err_acrdmm = 1; /* 1 means we found no acdirmax value */
if (!err_acval) {
nap->acdirmax = acval; /* max ac timeout for dirs (sec) */
} else {
# ifdef MNTTAB_OPT_ACDIRMAX
int tmp;
err_acrdmm = hasmntvalerr(mntp, MNTTAB_OPT_ACDIRMAX, &tmp);
nap->acdirmax = tmp;
# else /* not MNTTAB_OPT_ACDIRMAX */
nap->acdirmax = 0;
# endif /* not MNTTAB_OPT_ACDIRMAX */
}
/* set this flag iff we changed acdirmax (possibly to zero) */
# ifdef MNT2_NFS_OPT_ACDIRMAX
if (!err_acval || !err_acrdmm)
nap->flags |= MNT2_NFS_OPT_ACDIRMAX;
# endif /* MNT2_NFS_OPT_ACDIRMAX */
#endif /* HAVE_NFS_ARGS_T_ACDIRMAX */

/* don't cache attributes */
#if defined(MNTTAB_OPT_NOAC) && defined(MNT2_NFS_OPT_NOAC)
if (amu_hasmntopt(mntp, MNTTAB_OPT_NOAC) != NULL)
nap->flags |= MNT2_NFS_OPT_NOAC;
#endif /* defined(MNTTAB_OPT_NOAC) && defined(MNT2_NFS_OPT_NOAC) */
(void)err_acval;
}

static void
compute_nfs_common_args(struct nfs_common_args *nap, mntent_t *mntp,
const char *nfs_proto, u_long nfs_version)
{
#ifdef MNT2_NFS_OPT_TCP
if (nfs_proto && STREQ(nfs_proto, "tcp"))
nap->flags |= MNT2_NFS_OPT_TCP;
#endif /* MNT2_NFS_OPT_TCP */

#ifdef MNT2_NFS_OPT_NOCONN
/* check if user specified to use unconnected or connected sockets */
if (amu_hasmntopt(mntp, MNTTAB_OPT_NOCONN) != NULL)
nap->flags |= MNT2_NFS_OPT_NOCONN;
else if (amu_hasmntopt(mntp, MNTTAB_OPT_CONN) != NULL)
nap->flags &= ~MNT2_NFS_OPT_NOCONN;
else {
/*
* Some OSs want you to set noconn always. Some want you to always turn
* it off. Others want you to turn it on/off only if NFS V.3 is used.
* And all of that changes from revision to another. This is
* particularly true of OpenBSD, NetBSD, and FreeBSD. So, rather than
* attempt to auto-detect this, I'm forced to "fix" it in the individual
* conf/nfs_prot/nfs_prot_*.h files.
*/
# ifdef USE_UNCONNECTED_NFS_SOCKETS
if (!(nap->flags & MNT2_NFS_OPT_NOCONN)) {
nap->flags |= MNT2_NFS_OPT_NOCONN;
plog(XLOG_WARNING, "noconn option not specified, and was just turned ON (OS override)! (May cause NFS hangs on some systems...)");
}
# endif /* USE_UNCONNECTED_NFS_SOCKETS */
# ifdef USE_CONNECTED_NFS_SOCKETS
if (nap->flags & MNT2_NFS_OPT_NOCONN) {
nap->flags &= ~MNT2_NFS_OPT_NOCONN;
plog(XLOG_WARNING, "noconn option specified, and was just turned OFF (OS override)! (May cause NFS hangs on some systems...)");
}
# endif /* USE_CONNECTED_NFS_SOCKETS */
}
#endif /* MNT2_NFS_OPT_NOCONN */

#ifdef MNT2_NFS_OPT_RESVPORT
# ifdef MNTTAB_OPT_RESVPORT
if (amu_hasmntopt(mntp, MNTTAB_OPT_RESVPORT) != NULL)
nap->flags |= MNT2_NFS_OPT_RESVPORT;
# else /* not MNTTAB_OPT_RESVPORT */
nap->flags |= MNT2_NFS_OPT_RESVPORT;
# endif /* not MNTTAB_OPT_RESVPORT */
#endif /* MNT2_NFS_OPT_RESVPORT */

nap->rsize = hasmntval(mntp, MNTTAB_OPT_RSIZE);
#ifdef MNT2_NFS_OPT_RSIZE
if (nap->rsize)
nap->flags |= MNT2_NFS_OPT_RSIZE;
#endif /* MNT2_NFS_OPT_RSIZE */
if (nfs_version == NFS_VERSION && nap->rsize > 8192)
nap->rsize = 8192;

nap->wsize = hasmntval(mntp, MNTTAB_OPT_WSIZE);
#ifdef MNT2_NFS_OPT_WSIZE
if (nap->wsize)
nap->flags |= MNT2_NFS_OPT_WSIZE;
#endif /* MNT2_NFS_OPT_WSIZE */
if (nfs_version == NFS_VERSION && nap->wsize > 8192)
nap->wsize = 8192;

nap->timeo = hasmntval(mntp, MNTTAB_OPT_TIMEO);
#ifdef MNT2_NFS_OPT_TIMEO
if (nap->timeo)
nap->flags |= MNT2_NFS_OPT_TIMEO;
#endif /* MNT2_NFS_OPT_TIMEO */

nap->retrans = hasmntval(mntp, MNTTAB_OPT_RETRANS);
#ifdef MNT2_NFS_OPT_RETRANS
if (nap->retrans)
nap->flags |= MNT2_NFS_OPT_RETRANS;
#endif /* MNT2_NFS_OPT_RETRANS */

#ifdef MNT2_NFS_OPT_SOFT
if (amu_hasmntopt(mntp, MNTTAB_OPT_SOFT) != NULL)
nap->flags |= MNT2_NFS_OPT_SOFT;
#endif /* MNT2_NFS_OPT_SOFT */

#ifdef MNT2_NFS_OPT_SPONGY
if (amu_hasmntopt(mntp, MNTTAB_OPT_SPONGY) != NULL) {
nap->flags |= MNT2_NFS_OPT_SPONGY;
if (*flags & MNT2_NFS_OPT_SOFT) {
plog(XLOG_USER, "Mount opts soft and spongy are incompatible - soft ignored");
nap->flags &= ~MNT2_NFS_OPT_SOFT;
}
}
#endif /* MNT2_NFS_OPT_SPONGY */

#if defined(MNT2_GEN_OPT_RONLY) && defined(MNT2_NFS_OPT_RONLY)
/* Ultrix has separate generic and NFS ro flags */
if (genflags & MNT2_GEN_OPT_RONLY)
nap->flags |= MNT2_NFS_OPT_RONLY;
#endif /* defined(MNT2_GEN_OPT_RONLY) && defined(MNT2_NFS_OPT_RONLY) */

#ifdef MNTTAB_OPT_INTR
if (amu_hasmntopt(mntp, MNTTAB_OPT_INTR) != NULL)
/*
* Either turn on the "allow interrupts" option, or
* turn off the "disallow interrupts" option"
*/
# ifdef MNT2_NFS_OPT_INTR
nap->flags |= MNT2_NFS_OPT_INTR;
# endif /* MNT2_NFS_OPT_INTR */
# ifdef MNT2_NFS_OPT_NOINTR
nap->flags &= ~MNT2_NFS_OPT_NOINTR;
# endif /* MNT2_NFS_OPT_NOINTR */
# ifdef MNT2_NFS_OPT_INT
nap->flags |= MNT2_NFS_OPT_INT;
# endif /* MNT2_NFS_OPT_INT */
# ifdef MNT2_NFS_OPT_NOINT
nap->flags &= ~MNT2_NFS_OPT_NOINT;
# endif /* MNT2_NFS_OPT_NOINT */
#endif /* MNTTAB_OPT_INTR */

#ifdef MNT2_NFS_OPT_NOACL
if (amu_hasmntopt(mntp, MNTTAB_OPT_NOACL) != NULL)
nap->flags |= MNT2_NFS_OPT_NOACL;
#endif /* MNT2_NFS_OPT_NOACL */

#ifdef MNTTAB_OPT_NODEVS
if (amu_hasmntopt(mntp, MNTTAB_OPT_NODEVS) != NULL)
nap->flags |= MNT2_NFS_OPT_NODEVS;
#endif /* MNTTAB_OPT_NODEVS */

#ifdef MNTTAB_OPT_COMPRESS
if (amu_hasmntopt(mntp, MNTTAB_OPT_COMPRESS) != NULL)
nap->flags |= MNT2_NFS_OPT_COMPRESS;
#endif /* MNTTAB_OPT_COMPRESS */

#ifdef MNTTAB_OPT_PRIVATE /* mount private, single-client tree */
if (amu_hasmntopt(mntp, MNTTAB_OPT_PRIVATE) != NULL)
nap->flags |= MNT2_NFS_OPT_PRIVATE;
#endif /* MNTTAB_OPT_PRIVATE */

#if defined(MNT2_NFS_OPT_NOCTO) && defined(MNTTAB_OPT_NOCTO)
if (amu_hasmntopt(mntp, MNTTAB_OPT_NOCTO) != NULL)
nap->flags |= MNT2_NFS_OPT_NOCTO;
#endif /* defined(MNT2_NFS_OPT_NOCTO) && defined(MNTTAB_OPT_NOCTO) */

#if defined(MNT2_NFS_OPT_PROPLIST) && defined(MNTTAB_OPT_PROPLIST)
if (amu_hasmntopt(mntp, MNTTAB_OPT_PROPLIST) != NULL)
nap->flags |= MNT2_NFS_OPT_PROPLIST;
#endif /* defined(MNT2_NFS_OPT_PROPLIST) && defined(MNTTAB_OPT_PROPLIST) */

#if defined(MNT2_NFS_OPT_NONLM) && defined(MNTTAB_OPT_NOLOCK)
if (amu_hasmntopt(mntp, MNTTAB_OPT_NOLOCK) != NULL)
nap->flags |= MNT2_NFS_OPT_NONLM;
#endif /* defined(MNT2_NFS_OPT_NONLM) && defined(MNTTAB_OPT_NOLOCK) */

#if defined(MNT2_NFS_OPT_XLATECOOKIE) && defined(MNTTAB_OPT_XLATECOOKIE)
if (amu_hasmntopt(mntp, MNTTAB_OPT_XLATECOOKIE) != NULL)
nap->flags |= MNT2_NFS_OPT_XLATECOOKIE;
#endif /* defined(MNT2_NFS_OPT_XLATECOOKIE) && defined(MNTTAB_OPT_XLATECOOKIE) */
}

#ifdef DEBUG
static void
print_nfs_common_args(const struct nfs_common_args *a)
{
plog(XLOG_DEBUG, "NA->flags = 0x%lx", a->flags);

plog(XLOG_DEBUG, "NA->rsize = %lu", a->rsize);
plog(XLOG_DEBUG, "NA->wsize = %lu", a->wsize);
plog(XLOG_DEBUG, "NA->timeo = %lu", a->timeo);
plog(XLOG_DEBUG, "NA->retrans = %lu", a->retrans);

#ifdef HAVE_NFS_ARGS_T_ACREGMIN
plog(XLOG_DEBUG, "NA->acregmin = %lu", a->acregmin);
plog(XLOG_DEBUG, "NA->acregmax = %lu", a->acregmax);
plog(XLOG_DEBUG, "NA->acdirmin = %lu", a->acdirmin);
plog(XLOG_DEBUG, "NA->acdirmax = %lu", a->acdirmax);
#endif /* HAVE_NFS_ARGS_T_ACREGMIN */
}
#endif

static void
discard_nfs23_args(nfs_args_t *nap)
{
#ifdef HAVE_TRANSPORT_TYPE_TLI
free_knetconfig(nap->knconf);
if (nap->addr)
XFREE(nap->addr); /* allocated in compute_nfs_args() */
#endif /* HAVE_TRANSPORT_TYPE_TLI */
}

#ifdef DEBUG
/* get string version (in hex) of identifier */
static char *
get_hex_string(u_int len, const char *fhdata)
{
u_int i;
static u_int xlen;
static char *buf;
static u_short *arr;
char str[16];

if (!fhdata || len == 0 || len > 10240)
return NULL;
i = len * 4 + 1;
if (xlen < i) {
buf = xrealloc(buf, i);
arr = xrealloc(arr, len * sizeof(*arr));
xlen = i;
}

buf[0] = '\0';
memset(arr, 0, len * sizeof(*arr));
memcpy(arr, fhdata, len);
len /= sizeof(*arr);
for (i = 0; i < len; i++) {
xsnprintf(str, sizeof(str), "%04x", ntohs(arr[i]));
xstrlcat(buf, str, xlen);
}
return buf;
}

static void
print_nfs_sockaddr_in(const char *tag, const struct sockaddr_in *sap)
{
char name[64];
plog(XLOG_DEBUG, "NA->%s.sin_family = %d", tag, sap->sin_family);
plog(XLOG_DEBUG, "NA->%s.sin_port = %d", tag, ntohs(sap->sin_port));
if (inet_ntop(AF_INET, &sap->sin_addr, name, sizeof(name)) == NULL)
return;
plog(XLOG_DEBUG, "NA->%s.sin_addr = \"%s\"", tag, name);
}

/*
* print a subset of fields from "struct nfs_args" that are otherwise
* not being provided anywhere else.
*/
static void
print_nfs23_args(const nfs_args_t *nap, u_long nfs_version)
{
int fhlen = 32; /* default: NFS V.2 file handle length is 32 */
#ifdef HAVE_TRANSPORT_TYPE_TLI
struct netbuf *nbp;
struct knetconfig *kncp;
#else /* not HAVE_TRANSPORT_TYPE_TLI */
struct sockaddr_in *sap;
#endif /* not HAVE_TRANSPORT_TYPE_TLI */
struct nfs_common_args a;

if (!nap) {
plog(XLOG_DEBUG, "NULL nfs_args!");
return;
}

/* override default file handle size */
#ifdef FHSIZE
fhlen = FHSIZE;
#endif /* FHSIZE */
#ifdef NFS_FHSIZE
fhlen = NFS_FHSIZE;
#endif /* NFS_FHSIZE */

#ifdef HAVE_TRANSPORT_TYPE_TLI
nbp = nap->addr;
plog(XLOG_DEBUG, "NA->addr {netbuf} (maxlen=%d, len=%d) = \"%s\"",
nbp->maxlen, nbp->len,
get_hex_string(nbp->len, nbp->buf));
nbp = nap->syncaddr;
plog(XLOG_DEBUG, "NA->syncaddr {netbuf} %p", nbp);
kncp = nap->knconf;
plog(XLOG_DEBUG, "NA->knconf->semantics %lu", (u_long) kncp->knc_semantics);
plog(XLOG_DEBUG, "NA->knconf->protofmly \"%s\"", kncp->knc_protofmly);
plog(XLOG_DEBUG, "NA->knconf->proto \"%s\"", kncp->knc_proto);
plog(XLOG_DEBUG, "NA->knconf->rdev %lu", (u_long) kncp->knc_rdev);
/* don't print knconf->unused field */
#else /* not HAVE_TRANSPORT_TYPE_TLI */
# ifdef NFS_ARGS_T_ADDR_IS_POINTER
sap = (struct sockaddr_in *) nap->addr;
# else /* not NFS_ARGS_T_ADDR_IS_POINTER */
sap = (struct sockaddr_in *) &nap->addr;
# endif /* not NFS_ARGS_T_ADDR_IS_POINTER */
#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
/* as per POSIX, sin_len need not be set (used internally by kernel) */
plog(XLOG_DEBUG, "NA->addr.sin_len = %d", sap->sin_len);
#endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
print_nfs_sockaddr_in("addr", sap);
#endif /* not HAVE_TRANSPORT_TYPE_TLI */
#ifdef HAVE_NFS_ARGS_T_ADDRLEN
plog(XLOG_DEBUG, "NA->addrlen = %d", nap->addrlen);
#endif /* ifdef HAVE_NFS_ARGS_T_ADDRLEN */

plog(XLOG_DEBUG, "NA->hostname = \"%s\"", nap->hostname ? nap->hostname : "null");
#ifdef HAVE_NFS_ARGS_T_NAMLEN
plog(XLOG_DEBUG, "NA->namlen = %d", nap->namlen);
#endif /* HAVE_NFS_ARGS_T_NAMLEN */

#ifdef MNT2_NFS_OPT_FSNAME
plog(XLOG_DEBUG, "NA->fsname = \"%s\"", nap->fsname ? nap->fsname : "null");
#endif /* MNT2_NFS_OPT_FSNAME */

#ifdef HAVE_NFS_ARGS_T_FHSIZE
plog(XLOG_DEBUG, "NA->fhsize = %d", nap->fhsize);
fhlen = nap->fhsize;
#endif /* HAVE_NFS_ARGS_T_FHSIZE */
#ifdef HAVE_NFS_ARGS_T_FH_LEN
plog(XLOG_DEBUG, "NA->fh_len = %d", nap->fh_len);
fhlen = nap->fh_len;
#endif /* HAVE_NFS_ARGS_T_FH_LEN */

/*
* XXX: need to figure out how to correctly print file handles,
* since some times they are pointers, and sometimes the real structure
* is stored in nfs_args. Even if it is a pointer, it can be the actual
* char[] array, or a structure containing multiple fields.
*/
plog(XLOG_DEBUG, "NA->filehandle = \"%s\"",
get_hex_string(fhlen, (const char *) &nap->NFS_FH_FIELD));

#ifdef HAVE_NFS_ARGS_T_SOTYPE
plog(XLOG_DEBUG, "NA->sotype = %d", nap->sotype);
#endif /* HAVE_NFS_ARGS_T_SOTYPE */
#ifdef HAVE_NFS_ARGS_T_PROTO
plog(XLOG_DEBUG, "NA->proto = %d", (int) nap->proto);
#endif /* HAVE_NFS_ARGS_T_PROTO */
#ifdef HAVE_NFS_ARGS_T_VERSION
plog(XLOG_DEBUG, "NA->version = %d", nap->version);
#endif /* HAVE_NFS_ARGS_T_VERSION */

put_nfs_common_args(nap, a);
print_nfs_common_args(&a);

#ifdef HAVE_NFS_ARGS_T_BSIZE
plog(XLOG_DEBUG, "NA->bsize = %d", nap->bsize);
#endif /* HAVE_NFS_ARGS_T_BSIZE */

#ifdef MNTTAB_OPT_SYMTTL
plog(XLOG_DEBUG, "NA->symttl = %d", nap->symttl);
#endif /* MNTTAB_OPT_SYMTTL */
#ifdef MNTTAB_OPT_PG_THRESH
plog(XLOG_DEBUG, "NA->pg_thresh = %d", nap->pg_thresh);
#endif /* MNTTAB_OPT_PG_THRESH */

#ifdef MNT2_NFS_OPT_BIODS
plog(XLOG_DEBUG, "NA->biods = %d", nap->biods);
#endif /* MNT2_NFS_OPT_BIODS */

}
#endif /* DEBUG */

/*
* Fill in the many possible fields and flags of struct nfs_args.
*
* nap: pre-allocated structure to fill in.
* mntp: mount entry structure (includes options)
* genflags: generic mount flags already determined
* nfsncp: (TLI only) netconfig entry for this NFS mount
* ip_addr: IP address of file server
* nfs_version: 2, 3, or 0 if unknown
* nfs_proto: "udp", "tcp", or NULL.
* fhp: file handle structure pointer
* host_name: name of remote NFS host
* fs_name: remote file system name to mount
*/
static void
compute_nfs23_args(nfs_args_t *nap,
mntent_t *mntp,
int genflags,
struct netconfig *nfsncp,
struct sockaddr_in *ip_addr,
u_long nfs_version,
char *nfs_proto,
am_nfs_handle_t *fhp,
char *host_name,
char *fs_name)
{
struct nfs_common_args a;
/* initialize just in case */
memset((voidp) nap, 0, sizeof(nfs_args_t));

/* compute all of the NFS attribute-cache flags */
memset(&a, 0, sizeof(a));
compute_nfs_attrcache_flags(&a, mntp);
compute_nfs_common_args(&a, mntp, nfs_proto, nfs_version);
get_nfs_common_args(nap, a);

/************************************************************************/
/*** FILEHANDLE DATA AND LENGTH ***/
/************************************************************************/
#ifdef HAVE_FS_NFS3
if (nfs_version == NFS_VERSION3) {
if (fhp == NULL) {
plog(XLOG_FATAL, "cannot pass NULL fh for NFSv%lu", nfs_version);
going_down(1);
return;
}

# if defined(HAVE_NFS_ARGS_T_FHSIZE) || defined(HAVE_NFS_ARGS_T_FH_LEN)
/*
* Some systems (Irix/bsdi3) have a separate field in nfs_args for
* the length of the file handle for NFS V3. They insist that
* the file handle set in nfs_args be plain bytes, and not
* include the length field.
*/
NFS_FH_DREF(nap->NFS_FH_FIELD, &fhp->v3.am_fh3_data);
# else /* not defined(HAVE_NFS_ARGS_T_FHSIZE) || defined(HAVE_NFS_ARGS_T_FH_LEN) */
NFS_FH_DREF(nap->NFS_FH_FIELD, &fhp->v3);
# endif /* not defined(HAVE_NFS_ARGS_T_FHSIZE) || defined(HAVE_NFS_ARGS_T_FH_LEN) */
# ifdef MNT2_NFS_OPT_NFSV3
nap->flags |= MNT2_NFS_OPT_NFSV3;
# endif /* MNT2_NFS_OPT_NFSV3 */
# ifdef MNT2_NFS_OPT_VER3
nap->flags |= MNT2_NFS_OPT_VER3;
# endif /* MNT2_NFS_OPT_VER3 */
} else
#endif /* HAVE_FS_NFS3 */
{
if (fhp == NULL) {
plog(XLOG_FATAL, "cannot pass NULL fh for NFSv%lu", nfs_version);
going_down(1);
return;
}
NFS_FH_DREF(nap->NFS_FH_FIELD, &fhp->v2);
}

#ifdef HAVE_NFS_ARGS_T_FHSIZE
# ifdef HAVE_FS_NFS3
if (nfs_version == NFS_VERSION3)
nap->fhsize = fhp->v3.am_fh3_length;
else
# endif /* HAVE_FS_NFS3 */
nap->fhsize = FHSIZE;
#endif /* HAVE_NFS_ARGS_T_FHSIZE */

/* this is the version of the nfs_args structure, not of NFS! */
#ifdef HAVE_NFS_ARGS_T_FH_LEN
# ifdef HAVE_FS_NFS3
if (nfs_version == NFS_VERSION3)
nap->fh_len = fhp->v3.am_fh3_length;
else
# endif /* HAVE_FS_NFS3 */
nap->fh_len = FHSIZE;
#endif /* HAVE_NFS_ARGS_T_FH_LEN */

/************************************************************************/
/*** HOST NAME ***/
/************************************************************************/
/*
* XXX: warning, using xstrlcpy in NFS_HN_DREF, which may corrupt a
* struct nfs_args, or truncate our concocted "hostname:/path"
* string prematurely.
*/
NFS_HN_DREF(nap->hostname, host_name);
#ifdef MNT2_NFS_OPT_HOSTNAME
nap->flags |= MNT2_NFS_OPT_HOSTNAME;
#endif /* MNT2_NFS_OPT_HOSTNAME */

/************************************************************************/
/*** IP ADDRESS OF REMOTE HOST ***/
/************************************************************************/
if (ip_addr) {
#ifdef HAVE_TRANSPORT_TYPE_TLI
nap->addr = ALLOC(struct netbuf); /* free()'ed at end of mount_nfs_fh() */
#endif /* HAVE_TRANSPORT_TYPE_TLI */
NFS_SA_DREF(nap, ip_addr);
}

/************************************************************************/
/*** NFS PROTOCOL (UDP, TCP) AND VERSION ***/
/************************************************************************/
#ifdef HAVE_NFS_ARGS_T_SOTYPE
/* bsdi3 uses this */
if (nfs_proto) {
if (STREQ(nfs_proto, "tcp"))
nap->sotype = SOCK_STREAM;
else if (STREQ(nfs_proto, "udp"))
nap->sotype = SOCK_DGRAM;
}
#endif /* HAVE_NFS_ARGS_T_SOTYPE */

#ifdef HAVE_NFS_ARGS_T_PROTO
nap->proto = 0; /* bsdi3 sets this field to zero */
# ifdef IPPROTO_TCP
if (nfs_proto) {
if (STREQ(nfs_proto, "tcp")) /* AIX 4.2.x needs this */
nap->proto = IPPROTO_TCP;
else if (STREQ(nfs_proto, "udp"))
nap->proto = IPPROTO_UDP;
}
# endif /* IPPROTO_TCP */
#endif /* HAVE_NFS_ARGS_T_SOTYPE */

#ifdef HAVE_NFS_ARGS_T_VERSION
# ifdef NFS_ARGSVERSION
nap->version = NFS_ARGSVERSION; /* BSDI 3.0 and OpenBSD 2.2 */
# endif /* NFS_ARGSVERSION */
# ifdef DG_MOUNT_NFS_VERSION
nap->version = DG_MOUNT_NFS_VERSION; /* dg-ux */
# endif /* DG_MOUNT_NFS_VERSION */
#endif /* HAVE_NFS_ARGS_VERSION */

/************************************************************************/
/*** OTHER NFS SOCKET RELATED OPTIONS AND FLAGS ***/
/************************************************************************/

/************************************************************************/
/*** OTHER FLAGS AND OPTIONS ***/
/************************************************************************/

#ifdef MNT2_NFS_OPT_BIODS
if ((nap->biods = hasmntval(mntp, MNTTAB_OPT_BIODS)))
nap->flags |= MNT2_NFS_OPT_BIODS;
#endif /* MNT2_NFS_OPT_BIODS */

#ifdef MNTTAB_OPT_SYMTTL /* symlink cache time-to-live */
if ((nap->symttl = hasmntval(mntp, MNTTAB_OPT_SYMTTL)))
nap->args.flags |= MNT2_NFS_OPT_SYMTTL;
#endif /* MNTTAB_OPT_SYMTTL */

#ifdef MNT2_NFS_OPT_PGTHRESH /* paging threshold */
if ((nap->pg_thresh = hasmntval(mntp, MNTTAB_OPT_PGTHRESH)))
nap->args.flags |= MNT2_NFS_OPT_PGTHRESH;
#endif /* MNT2_NFS_OPT_PGTHRESH */

#if defined(MNT2_NFS_OPT_POSIX) && defined(MNTTAB_OPT_POSIX)
if (amu_hasmntopt(mntp, MNTTAB_OPT_POSIX) != NULL) {
nap->flags |= MNT2_NFS_OPT_POSIX;
# ifdef HAVE_NFS_ARGS_T_PATHCONF
nap->pathconf = NULL;
# endif /* HAVE_NFS_ARGS_T_PATHCONF */
}
#endif /* MNT2_NFS_OPT_POSIX && MNTTAB_OPT_POSIX */

#ifdef HAVE_TRANSPORT_TYPE_TLI
/* set up syncaddr field */
nap->syncaddr = (struct netbuf *) NULL;

/* set up knconf field */
if (get_knetconfig(&nap->knconf, nfsncp, nfs_proto) < 0) {
plog(XLOG_FATAL, "cannot fill knetconfig structure for nfs_args");
going_down(1);
return;
}
/* update the flags field for knconf */
nap->args.flags |= MNT2_NFS_OPT_KNCONF;
#endif /* HAVE_TRANSPORT_TYPE_TLI */

#ifdef MNT2_NFS_OPT_FSNAME
nap->fsname = fs_name;
nap->args.flags |= MNT2_NFS_OPT_FSNAME;
#endif /* MNT2_NFS_OPT_FSNAME */

#ifdef HAVE_NFS_ARGS_T_OPTSTR
nap->optstr = mntp->mnt_opts;
#endif /* HAVE_NFS_ARGS_T_OPTSTR */

#if defined(MNT2_NFS_OPT_MAXGRPS) && defined(MNTTAB_OPT_MAXGROUPS)
nap->maxgrouplist = hasmntval(mntp, MNTTAB_OPT_MAXGROUPS);
if (nap->maxgrouplist != 0)
nap->flags |= MNT2_NFS_OPT_MAXGRPS;
#endif /* defined(MNT2_NFS_OPT_MAXGRPS) && defined(MNTTAB_OPT_MAXGROUPS) */

/************************************************************************/
/*** FINAL ACTIONS ***/
/************************************************************************/

#ifdef HAVE_NFS_ARGS_T_GFS_FLAGS
/* Ultrix stores generic flags in nfs_args.gfs_flags. */
nap->gfs_flags = genflags;
#endif /* HAVE_NFS_ARGS_T_FLAGS */

return; /* end of compute_nfs_args() function */
}

#ifdef HAVE_FS_NFS4

#define RPC_AUTH_GSS_KRB5 390003
#define RPC_AUTH_GSS_KRB5I 390004
#define RPC_AUTH_GSS_KRB5P 390005
#define RPC_AUTH_GSS_LKEY 390006
#define RPC_AUTH_GSS_LKEYI 390007
#define RPC_AUTH_GSS_LKEYP 390008
#define RPC_AUTH_GSS_SPKM 390009
#define RPC_AUTH_GSS_SPKMI 390010
#define RPC_AUTH_GSS_SPKMP 390011

struct {
const char *name;
int num;
} flavours[] = {
{ "unix", AUTH_UNIX },
{ "krb5", RPC_AUTH_GSS_KRB5 },
{ "krb5i", RPC_AUTH_GSS_KRB5I },
{ "krb5p", RPC_AUTH_GSS_KRB5P },
{ "lkey", RPC_AUTH_GSS_LKEY },
{ "lkeyi", RPC_AUTH_GSS_LKEYI },
{ "lkeyp", RPC_AUTH_GSS_LKEYP },
{ "spkm", RPC_AUTH_GSS_SPKM },
{ "spkmi", RPC_AUTH_GSS_SPKMI },
{ "spkmp", RPC_AUTH_GSS_SPKMP },
};

static char *
set_nfs4_security(nfs4_args_t *nap, mntent_t *mntp)
{
const char *o = hasmnteq(mntp, MNTTAB_OPT_SEC);
char *q, *s, *ss;
size_t l, i;

if (o == NULL)
o = "unix";

for (l = 1, q = strchr(o, ','); q; q = strchr(q + 1, ','))
l++;

nap->auth_flavours = xmalloc(l * sizeof(*nap->auth_flavours));

s = ss = xstrdup(o);
for (;;) {
q = strchr(s, ',');
if (q)
*q = '\0';

for (l = 0, i = 0; i < sizeof(flavours) / sizeof(flavours[0]); i++)
if (strcmp(flavours[i].name, s) == 0) {
nap->auth_flavours[l++] = flavours[i].num;
break;
}

if (i == sizeof(flavours) / sizeof(flavours[0]))
plog(XLOG_ERROR, "Unknown NFSv4 security mechanism %s\n", s);

if (q == NULL)
break;

*q = ':';
s = ++q;
}

nap->auth_flavourlen = l;
return ss;
}

static int
get_my_ipv4addr(struct nfs_string *ns)
{
struct hostent *hp;
char myname[MAXHOSTNAMELEN];

if (gethostname(myname, sizeof(myname)) == -1)
return -1;
if ((hp = gethostbyname(myname)) == NULL)
return -1;
if (inet_ntop(AF_INET, hp->h_addr, myname, sizeof(myname)) == NULL)
return -1;
ns->len = strlen(myname);
ns->data = xmalloc(ns->len + 1);
memcpy(ns->data, myname, ns->len + 1);
return 0;
}

static void
add_nfs4_mntopts(const nfs4_args_t *nap, mntent_t *mntp, char *sec)
{
char *opts = mntp->mnt_opts;
char buf[1024], addr[128];
size_t len = strlen(mntp->mnt_opts);

if (inet_ntop(AF_INET,
&((const struct sockaddr_in *)nap->host_addr)->sin_addr,
addr, sizeof(addr)) == NULL)
return;

xsnprintf(buf, sizeof(buf), ",clientaddr=%s,addr=%s", nap->client_addr.data,
addr);

len += strlen(buf) + 1;

if (sec && strcmp(sec, "unix") != 0) {
len += strlen(sec) + strlen(MNTTAB_OPT_SEC) + 2; /* 2 = ",=" */
} else
sec = NULL;

opts = xrealloc(mntp->mnt_opts, len);
xstrlcat(opts, buf, len);

if (sec) {
xstrlcat(opts, ",", len);
xstrlcat(opts, MNTTAB_OPT_SEC, len);
xstrlcat(opts, "=", len);
xstrlcat(opts, sec, len);
}

mntp->mnt_opts = opts;
}

static void
print_nfs4_security(const nfs4_args_t *nap)
{
char buf[1024];
char num[64];
size_t i, j;

buf[0] = '\0';

for (i = 0; i < nap->auth_flavourlen; i++) {

for (j = 0; j < sizeof(flavours) / sizeof(flavours[0]); j++)
if (flavours[j].num == nap->auth_flavours[i]) {
xstrlcpy(num, flavours[j].name, sizeof(num));
break;
}

if (j == sizeof(flavours) / sizeof(flavours[0])) {
plog(XLOG_ERROR, "Unknown NFSv4 security mechanism %d\n",
nap->auth_flavours[i]);
xsnprintf(num, sizeof(num), "*%d*", nap->auth_flavours[i]);
}

if (buf[0])
xstrlcat(buf, ":", sizeof(buf));

xstrlcat(buf, num, sizeof(buf));
}

plog(XLOG_DEBUG, "NA->auth_flavours \"%s\"\n", buf);
}

static void
discard_nfs4_args(nfs4_args_t *nap)
{
if (nap->client_addr.data)
free(nap->client_addr.data);
if (nap->hostname.data)
free(nap->hostname.data);
if (nap->mnt_path.data)
free(nap->mnt_path.data);
if (nap->host_addr)
free(nap->host_addr);
if (nap->auth_flavours)
free(nap->auth_flavours);
}

/*
* Fill in the many possible fields and flags of struct nfs4_args.
*
* nap: pre-allocated structure to fill in.
* mntp: mount entry structure (includes options)
* genflags: generic mount flags already determined
* nfsncp: (TLI only) netconfig entry for this NFS mount
* ip_addr: IP address of file server
* nfs_version: 4, or 0 if unknown
* nfs_proto: "udp", "tcp", or NULL.
* fhp: file handle structure pointer
* host_name: name of remote NFS host
* fs_name: remote file system name to mount
*/
static void
compute_nfs4_args(nfs4_args_t *nap,
mntent_t *mntp,
int genflags,
struct netconfig *nfsncp,
struct sockaddr_in *ip_addr,
u_long nfs_version,
char *nfs_proto,
am_nfs_handle_t *fhp,
char *host_name,
char *fs_name)
{
char *s;
struct nfs_common_args a;
uint16_t nfs_port;

/* initialize just in case */
memset((voidp) nap, 0, sizeof(nfs4_args_t));

/* compute all of the NFS attribute-cache flags */
memset(&a, 0, sizeof(a));
compute_nfs_attrcache_flags(&a, mntp);
compute_nfs_common_args(&a, mntp, nfs_proto, nfs_version);
get_nfs_common_args(nap, a);

get_my_ipv4addr(&nap->client_addr);

/************************************************************************/
/*** HOST NAME ***/
/************************************************************************/
nap->hostname.len = strlen(host_name);
nap->hostname.data = xmalloc(nap->hostname.len + 1);
memcpy(nap->hostname.data, host_name, nap->hostname.len + 1);

if ((s = strchr(fs_name, ':')) != NULL)
s++;
else
s = fs_name;

nap->mnt_path.len = strlen(s);
nap->mnt_path.data = xmalloc(nap->mnt_path.len + 1);
memcpy(nap->mnt_path.data, s, nap->mnt_path.len + 1);
plog(XLOG_DEBUG, "dir name %s\n", nap->mnt_path.data);

/************************************************************************/
/*** IP ADDRESS OF REMOTE HOST ***/
/************************************************************************/
nap->host_addrlen = sizeof(*ip_addr);
nap->host_addr = xmalloc(nap->host_addrlen);
memcpy(nap->host_addr, ip_addr, nap->host_addrlen);

nfs_port = hasmntval(mntp, MNTTAB_OPT_PORT);
if (nfs_port == 0)
nfs_port = htons(NFS_PORT);
else
nfs_port = htons(nfs_port);

((struct sockaddr_in *)nap->host_addr)->sin_port = nfs_port;

nap->proto = 0; /* bsdi3 sets this field to zero */
if (nfs_proto) {
if (STREQ(nfs_proto, "tcp")) /* AIX 4.2.x needs this */
nap->proto = IPPROTO_TCP;
else if (STREQ(nfs_proto, "udp"))
nap->proto = IPPROTO_UDP;
}

nap->version = NFS4_MOUNT_VERSION; /* BSDI 3.0 and OpenBSD 2.2 */

/************************************************************************/
/*** OTHER NFS SOCKET RELATED OPTIONS AND FLAGS ***/
/************************************************************************/

/************************************************************************/
/*** OTHER FLAGS AND OPTIONS ***/
/************************************************************************/

#if defined(MNT2_NFS_OPT_POSIX) && defined(MNTTAB_OPT_POSIX)
if (amu_hasmntopt(mntp, MNTTAB_OPT_POSIX) != NULL) {
nap->args.flags |= MNT2_NFS_OPT_POSIX;
# ifdef HAVE_NFS_ARGS_T_PATHCONF
nap->pathconf = NULL;
# endif /* HAVE_NFS_ARGS_T_PATHCONF */
}
#endif /* MNT2_NFS_OPT_POSIX && MNTTAB_OPT_POSIX */

#if defined(MNT2_NFS_OPT_MAXGRPS) && defined(MNTTAB_OPT_MAXGROUPS)
nap->maxgrouplist = hasmntval(mntp, MNTTAB_OPT_MAXGROUPS);
if (nap->maxgrouplist != 0)
nap->args.flags |= MNT2_NFS_OPT_MAXGRPS;
#endif /* defined(MNT2_NFS_OPT_MAXGRPS) && defined(MNTTAB_OPT_MAXGROUPS) */

#ifdef HAVE_NFS_ARGS_T_OPTSTR
nap->optstr = mntp->mnt_opts;
#endif /* HAVE_NFS_ARGS_T_OPTSTR */

/************************************************************************/
/*** FINAL ACTIONS ***/
/************************************************************************/

#ifdef HAVE_NFS_ARGS_T_GFS_FLAGS
/* Ultrix stores generic flags in nfs_args.gfs_flags. */
nap->gfs_flags = genflags;
#endif /* HAVE_NFS_ARGS_T_FLAGS */

s = set_nfs4_security(nap, mntp);

/* Add addresses to the mount options */
add_nfs4_mntopts(nap, mntp, s);

return; /* end of compute_nfs4_args() function */
}

#ifdef DEBUG
static void
print_nfs4_args(const nfs4_args_t *nap, u_long nfs_version)
{
struct sockaddr_in *sap;
struct nfs_common_args a;

if (!nap) {
plog(XLOG_DEBUG, "NULL nfs_args!");
return;
}

plog(XLOG_DEBUG, "NA->client_addr \"%s\"\n", nap->client_addr.data);
plog(XLOG_DEBUG, "NA->mnt_path = \"%s\"", nap->mnt_path.data);
plog(XLOG_DEBUG, "NA->hostname = \"%s\"", nap->hostname.data);
sap = (struct sockaddr_in *) nap->host_addr;
print_nfs_sockaddr_in("host_addr", sap);
plog(XLOG_DEBUG, "NA->proto = %d", (int) nap->proto);
#ifdef HAVE_NFS_ARGS_T_VERSION
plog(XLOG_DEBUG, "NA->version = %d", nap->version);
#endif /* HAVE_NFS_ARGS_T_VERSION */
print_nfs4_security(nap);

put_nfs_common_args(nap, a);
print_nfs_common_args(&a);
}
#endif
#endif /* HAVE_FS_NFS4 */

void
compute_nfs_args(void *nap,
mntent_t *mntp,
int genflags,
struct netconfig *nfsncp,
struct sockaddr_in *ip_addr,
u_long nfs_version,
char *nfs_proto,
am_nfs_handle_t *fhp,
char *host_name,
char *fs_name)
{
#ifdef HAVE_FS_NFS4
if (nfs_version == NFS_VERSION4)
compute_nfs4_args(nap, mntp, genflags, nfsncp, ip_addr, nfs_version,
nfs_proto, fhp, host_name, fs_name);
else
#endif /* HAVE_FS_NFS4 */
compute_nfs23_args(nap, mntp, genflags, nfsncp, ip_addr, nfs_version,
nfs_proto, fhp, host_name, fs_name);
}

void
discard_nfs_args(void *nap, u_long nfs_version)
{
#ifdef HAVE_FS_NFS4
if (nfs_version == NFS_VERSION4)
discard_nfs4_args(nap);
else
#endif /* HAVE_FS_NFS4 */
discard_nfs23_args(nap);
}

#ifdef DEBUG
void
print_nfs_args(const void *nap, u_long nfs_version)
{
#ifdef HAVE_FS_NFS4
if (nfs_version == NFS_VERSION4)
print_nfs4_args(nap, nfs_version);
else
#endif /* HAVE_FS_NFS4 */
print_nfs23_args(nap, nfs_version);
}
#endif

/*
* Fill in special values for flags and fields of nfs_args, for an
* automounter NFS mount.
*/
void
compute_automounter_nfs_args(nfs_args_t *nap, mntent_t *mntp)
{
struct nfs_common_args a;

#ifdef MNT2_NFS_OPT_SYMTTL
/*
* Don't let the kernel cache symbolic links we generate, or else lookups
* will bypass amd and fail to remount stuff as needed.
*/
plog(XLOG_INFO, "turning on NFS option symttl and setting value to 0");
nap->flags |= MNT2_NFS_OPT_SYMTTL;
nap->symttl = 0;
#endif /* MNT2_NFS_OPT_SYMTTL */

/*
* This completes the flags for the HIDE_MOUNT_TYPE code in the
* mount_amfs_toplvl() function in amd/amfs_toplvl.c.
* Some systems don't have a mount type, but a mount flag.
*/
#ifdef MNT2_NFS_OPT_AUTO
nap->flags |= MNT2_NFS_OPT_AUTO;
#endif /* MNT2_NFS_OPT_AUTO */
#ifdef MNT2_NFS_OPT_IGNORE
nap->flags |= MNT2_NFS_OPT_IGNORE;
#endif /* MNT2_NFS_OPT_IGNORE */
#ifdef MNT2_GEN_OPT_AUTOMNTFS
nap->flags |= MNT2_GEN_OPT_AUTOMNTFS;
#endif /* not MNT2_GEN_OPT_AUTOMNTFS */

#ifdef MNT2_NFS_OPT_DUMBTIMR
/*
* Don't let the kernel start computing throughput of Amd. The numbers
* will be meaningless because of the way Amd does mount retries.
*/
plog(XLOG_INFO, "%s: disabling nfs congestion window", mntp->mnt_dir);
nap->flags |= MNT2_NFS_OPT_DUMBTIMR;
#endif /* MNT2_NFS_OPT_DUMBTIMR */

/* compute all of the NFS attribute-cache flags */
memset(&a, 0, sizeof(a));
a.flags = nap->flags;
compute_nfs_attrcache_flags(&a, mntp);
get_nfs_common_args(nap, a);

/*
* Provide a slight bit more security by requiring the kernel to use
* reserved ports.
*/
#ifdef MNT2_NFS_OPT_RESVPORT
nap->flags |= MNT2_NFS_OPT_RESVPORT;
#endif /* MNT2_NFS_OPT_RESVPORT */
}

int
nfs_valid_version(u_long v)
{
return v >= NFS_VERS_MIN && v <= NFS_VERS_MAX;
}