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/**
* @file utils/nfsref/lookup.c
* @brief Examine junction metadata from a local file system object
*/
/*
* Copyright 2011, 2018 Oracle. All rights reserved.
*
* This file is part of nfs-utils.
*
* nfs-utils is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2.0 as
* published by the Free Software Foundation.
*
* nfs-utils 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 version 2.0 for more details.
*
* You should have received a copy of the GNU General Public License
* version 2.0 along with nfs-utils. If not, see:
*
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
*/
#include <stdint.h>
#include <stdbool.h>
#include <stdlib.h>
#include <stdio.h>
#include <rpcsvc/nfs_prot.h>
#include "junction.h"
#include "xlog.h"
#include "nfsref.h"
/**
* Display help message for "lookup" subcommand
*
* @param progname NUL-terminated C string containing name of program
* @return program exit status
*/
int
nfsref_lookup_help(const char *progname)
{
fprintf(stderr, " \n");
fprintf(stderr, "Usage: %s [ -t type ] lookup <junction path>\n\n",
progname);
fprintf(stderr, "Display the contents of the junction at "
"<junction path>. For NFS basic\n");
fprintf(stderr, "junctions, the local contents of the junction "
"are displayed. For FedFS\n");
fprintf(stderr, "junctions, FSL records are retrieved from the "
"NSDB and displayed.\n");
return EXIT_SUCCESS;
}
/**
* Convert a boolean value into a displayable string constant
*
* @param value boolean value
* @return NUL-terminated static constant C string
*/
static const char *
nfsref_lookup_display_boolean(_Bool value)
{
return value ? "true" : "false";
}
/**
* Display a single NFS location
*
* @param fsloc pointer to an NFS location structure
*/
static void
nfsref_lookup_display_nfs_location(struct nfs_fsloc *fsloc)
{
char *rootpath;
if (nsdb_path_array_to_posix(fsloc->nfl_rootpath, &rootpath) == FEDFS_OK) {
printf("%s:%s\n", fsloc->nfl_hostname, rootpath);
free(rootpath);
} else
printf("%s: - Invalid root path -\n", fsloc->nfl_hostname);
printf("\n");
printf("\tNFS port:\t%u\n", fsloc->nfl_hostport);
printf("\tValid for:\t%d\n", fsloc->nfl_validfor);
printf("\tCurrency:\t%d\n", fsloc->nfl_currency);
printf("\tFlags:\t\tvarsub(%s)\n",
nfsref_lookup_display_boolean(fsloc->nfl_flags.nfl_varsub));
printf("\tGenFlags:\twritable(%s), going(%s), split(%s)\n",
nfsref_lookup_display_boolean(fsloc->nfl_genflags.nfl_writable),
nfsref_lookup_display_boolean(fsloc->nfl_genflags.nfl_going),
nfsref_lookup_display_boolean(fsloc->nfl_genflags.nfl_split));
printf("\tTransFlags:\trdma(%s)\n",
nfsref_lookup_display_boolean(fsloc->nfl_transflags.nfl_rdma));
printf("\tClass:\t\tsimul(%u), handle(%u), fileid(%u)\n",
fsloc->nfl_info.nfl_simul,
fsloc->nfl_info.nfl_handle,
fsloc->nfl_info.nfl_fileid);
printf("\tClass:\t\twritever(%u), change(%u), readdir(%u)\n",
fsloc->nfl_info.nfl_writever,
fsloc->nfl_info.nfl_change,
fsloc->nfl_info.nfl_readdir);
printf("\tRead:\t\trank(%u), order(%u)\n",
fsloc->nfl_info.nfl_readrank, fsloc->nfl_info.nfl_readorder);
printf("\tWrite:\t\trank(%u), order(%u)\n",
fsloc->nfl_info.nfl_writerank, fsloc->nfl_info.nfl_writeorder);
printf("\n");
}
/**
* Display a list of NFS locations
*
* @param fslocs list of NFS locations to display
*/
static void
nfsref_lookup_display_nfs_locations(struct nfs_fsloc *fslocs)
{
struct nfs_fsloc *fsloc;
for (fsloc = fslocs; fsloc != NULL; fsloc = fsloc->nfl_next)
nfsref_lookup_display_nfs_location(fsloc);
}
/**
* List NFS locations in an nfs-basic junction
*
* @param junct_path NUL-terminated C string containing pathname of junction
* @return program exit status
*/
static int
nfsref_lookup_nfs_basic(const char *junct_path)
{
struct nfs_fsloc *fslocs = NULL;
FedFsStatus retval;
xlog(D_GENERAL, "%s: Looking up basic junction in %s",
__func__, junct_path);
retval = nfs_is_junction(junct_path);
switch (retval) {
case FEDFS_OK:
break;
case FEDFS_ERR_NOTJUNCT:
xlog(L_ERROR, "%s is not an nfs-basic junction", junct_path);
return EXIT_FAILURE;
default:
xlog(L_ERROR, "Failed to access %s: %s",
junct_path, nsdb_display_fedfsstatus(retval));
return EXIT_FAILURE;
}
retval = nfs_get_locations(junct_path, &fslocs);
if (retval != FEDFS_OK) {
xlog(L_ERROR, "Failed to access %s: %s",
junct_path, nsdb_display_fedfsstatus(retval));
return EXIT_FAILURE;
}
nfsref_lookup_display_nfs_locations(fslocs);
nfs_free_locations(fslocs);
return EXIT_SUCCESS;
}
/**
* Resolve either a FedFS or NFS basic junction
*
* @param junct_path NUL-terminated C string containing pathname of junction
* @return program exit status
*/
static int
nfsref_lookup_unspecified(const char *junct_path)
{
FedFsStatus retval;
retval = nfs_is_junction(junct_path);
if (retval == FEDFS_OK)
return nfsref_lookup_nfs_basic(junct_path);
xlog(L_ERROR, "%s is not a junction", junct_path);
return EXIT_FAILURE;
}
/**
* Enumerate metadata of a junction
*
* @param type type of junction to add
* @param junct_path NUL-terminated C string containing pathname of junction
* @return program exit status
*/
int
nfsref_lookup(enum nfsref_type type, const char *junct_path)
{
switch (type) {
case NFSREF_TYPE_UNSPECIFIED:
return nfsref_lookup_unspecified(junct_path);
case NFSREF_TYPE_NFS_BASIC:
return nfsref_lookup_nfs_basic(junct_path);
default:
xlog(L_ERROR, "Unrecognized junction type");
}
return EXIT_FAILURE;
}
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