path: root/smbinfo.c

/*
 * smbinfo
 *
 * Copyright (C) Ronnie Sahlberg (lsahlberg@redhat.com) 2018
 * Copyright (C) Aurelien Aptel (aaptel@suse.com) 2018
 *
 * Display SMB-specific file information using cifs IOCTL
 *
 * 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 of the License, 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.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif /* HAVE_CONFIG_H */

#include <endian.h>
#include <errno.h>
#include <getopt.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include <inttypes.h>

#define CIFS_IOCTL_MAGIC 0xCF

/* query_info flags */
#define PASSTHRU_QUERY_INFO     0x00000000
#define PASSTHRU_FSCTL          0x00000001

struct smb_query_info {
	uint32_t   info_type;
	uint32_t   file_info_class;
	uint32_t   additional_information;
	uint32_t   flags;
	uint32_t   input_buffer_length;
	uint32_t   output_buffer_length;
	/* char buffer[]; */
} __packed;

#define CIFS_QUERY_INFO _IOWR(CIFS_IOCTL_MAGIC, 7, struct smb_query_info)
#define INPUT_BUFFER_LENGTH 16384

int verbose;

static void
usage(char *name)
{
	fprintf(stderr, "Usage: %s [-V] <command> <file>\n"
		"-V for verbose output\n"
		"-h display this help text\n"
		"-v print smbinfo version\n"
		"Commands are\n"
		"  fileaccessinfo:\n"
		"      Prints FileAccessInfo for a cifs file.\n"
		"  filealigninfo:\n"
		"      Prints FileAlignInfo for a cifs file.\n"
		"  fileallinfo:\n"
		"      Prints FileAllInfo for a cifs file.\n"
		"  filebasicinfo:\n"
		"      Prints FileBasicInfo for a cifs file.\n"
		"  fileeainfo:\n"
		"      Prints FileEAInfo for a cifs file.\n"
		"  filefsfullsizeinfo:\n"
		"      Prints FileFsFullSizeInfo for a cifs share.\n"
		"  fileinternalinfo:\n"
		"      Prints FileInternalInfo for a cifs file.\n"
		"  filemodeinfo:\n"
		"      Prints FileModeInfo for a cifs file.\n"
		"  filepositioninfo:\n"
		"      Prints FilePositionInfo for a cifs file.\n"
		"  filestandardinfo:\n"
		"      Prints FileStandardInfo for a cifs file.\n"
		"  fsctl-getobjid:\n"
		"      Prints the objectid of the file and GUID of the underlying volume.\n"
		"  list-snapshots:\n"
		"      List the previous versions of the volume that backs this file.\n"
		"  quota:\n"
		"      Prints the quota for a cifs file.\n"
		"  secdesc:\n"
		"      Prints the security descriptor for a cifs file.\n",
		name);
	exit(1);
}

static void
short_usage(char *name)
{
	fprintf(stderr, "Usage: %s [-v] [-V] <command> <file>\n"
		"Try 'smbinfo -h' for more information.\n", name);
	exit(1);
}

static void
win_to_timeval(uint64_t smb2_time, struct timeval *tv)
{
	tv->tv_usec = (smb2_time / 10) % 1000000;
	tv->tv_sec  = (smb2_time - 116444736000000000) / 10000000;
}

struct bit_string {
	unsigned int bit;
	char *string;
};

struct bit_string directory_access_mask[] = {
	{ 0x00000001, "LIST_DIRECTORY" },
	{ 0x00000002, "ADD_FILE" },
	{ 0x00000004, "ADD_SUBDIRECTORY" },
	{ 0x00000008, "READ_EA" },
	{ 0x00000010, "WRITE_EA" },
	{ 0x00000020, "TRAVERSE" },
	{ 0x00000040, "DELETE_CHILD" },
	{ 0x00000080, "READ_ATTRIBUTES" },
	{ 0x00000100, "WRITE_ATTRIBUTES" },
	{ 0x00010000, "DELETE" },
	{ 0x00020000, "READ_CONTROL" },
	{ 0x00040000, "WRITE_DAC" },
	{ 0x00080000, "WRITE_OWNER" },
	{ 0x00100000, "SYNCHRONIZER" },
	{ 0x01000000, "ACCESS_SYSTEM_SECURITY" },
	{ 0x02000000, "MAXIMUM_ALLOWED" },
	{ 0x10000000, "GENERIC_ALL" },
	{ 0x20000000, "GENERIC_EXECUTE" },
	{ 0x40000000, "GENERIC_WRITE" },
	{ 0x80000000, "GENERIC_READ" },
	{ 0, NULL }
};

struct bit_string file_access_mask[] = {
	{ 0x00000001, "READ_DATA" },
	{ 0x00000002, "WRITE_DATA" },
	{ 0x00000004, "APPEND_DATA" },
	{ 0x00000008, "READ_EA" },
	{ 0x00000010, "WRITE_EA" },
	{ 0x00000020, "EXECUTE" },
	{ 0x00000040, "DELETE_CHILD" },
	{ 0x00000080, "READ_ATTRIBUTES" },
	{ 0x00000100, "WRITE_ATTRIBUTES" },
	{ 0x00010000, "DELETE" },
	{ 0x00020000, "READ_CONTROL" },
	{ 0x00040000, "WRITE_DAC" },
	{ 0x00080000, "WRITE_OWNER" },
	{ 0x00100000, "SYNCHRONIZER" },
	{ 0x01000000, "ACCESS_SYSTEM_SECURITY" },
	{ 0x02000000, "MAXIMUM_ALLOWED" },
	{ 0x10000000, "GENERIC_ALL" },
	{ 0x20000000, "GENERIC_EXECUTE" },
	{ 0x40000000, "GENERIC_WRITE" },
	{ 0x80000000, "GENERIC_READ" },
	{ 0, NULL }
};

static void
print_bits(uint32_t mask, struct bit_string *bs)