path: root/fs/cifs/cifsglob.h

/*
 *   fs/cifs/cifsglob.h
 *
 *   Copyright (C) International Business Machines  Corp., 2002,2008
 *   Author(s): Steve French (sfrench@us.ibm.com)
 *              Jeremy Allison (jra@samba.org)
 *
 *   This library is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Lesser General Public License as published
 *   by the Free Software Foundation; either version 2.1 of the License, or
 *   (at your option) any later version.
 *
 *   This library 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 Lesser General Public License for more details.
 *
 */
#ifndef _CIFS_GLOB_H
#define _CIFS_GLOB_H

#include <linux/in.h>
#include <linux/in6.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include "cifs_fs_sb.h"
#include "cifsacl.h"
#include <crypto/internal/hash.h>
#include <linux/scatterlist.h>

/*
 * The sizes of various internal tables and strings
 */
#define MAX_UID_INFO 16
#define MAX_SES_INFO 2
#define MAX_TCON_INFO 4

#define MAX_TREE_SIZE (2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1)
#define MAX_SERVER_SIZE 15
#define MAX_SHARE_SIZE 80
#define MAX_USERNAME_SIZE 256	/* reasonable maximum for current servers */
#define MAX_PASSWORD_SIZE 512	/* max for windows seems to be 256 wide chars */

#define CIFS_MIN_RCV_POOL 4

/*
 * default attribute cache timeout (jiffies)
 */
#define CIFS_DEF_ACTIMEO (1 * HZ)

/*
 * max attribute cache timeout (jiffies) - 2^30
 */
#define CIFS_MAX_ACTIMEO (1 << 30)

/*
 * MAX_REQ is the maximum number of requests that WE will send
 * on one socket concurrently.
 */
#define CIFS_MAX_REQ 32767

#define RFC1001_NAME_LEN 15
#define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)

/* currently length of NIP6_FMT */
#define SERVER_NAME_LENGTH 40
#define SERVER_NAME_LEN_WITH_NULL     (SERVER_NAME_LENGTH + 1)

/* used to define string lengths for reversing unicode strings */
/*         (256+1)*2 = 514                                     */
/*           (max path length + 1 for null) * 2 for unicode    */
#define MAX_NAME 514

#include "cifspdu.h"

#ifndef XATTR_DOS_ATTRIB
#define XATTR_DOS_ATTRIB "user.DOSATTRIB"
#endif

/*
 * CIFS vfs client Status information (based on what we know.)
 */

/* associated with each tcp and smb session */
enum statusEnum {
	CifsNew = 0,
	CifsGood,
	CifsExiting,
	CifsNeedReconnect,
	CifsNeedNegotiate
};

enum securityEnum {
	LANMAN = 0,			/* Legacy LANMAN auth */
	NTLM,			/* Legacy NTLM012 auth with NTLM hash */
	NTLMv2,			/* Legacy NTLM auth with NTLMv2 hash */
	RawNTLMSSP,		/* NTLMSSP without SPNEGO, NTLMv2 hash */
/*	NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
	Kerberos,		/* Kerberos via SPNEGO */
};

enum protocolEnum {
	TCP = 0,
	SCTP
	/* Netbios frames protocol not supported at this time */
};

struct session_key {
	unsigned int len;
	char *response;
};

/* crypto security descriptor definition */
struct sdesc {
	struct shash_desc shash;
	char ctx[];
};

/* crypto hashing related structure/fields, not specific to a sec mech */
struct cifs_secmech {
	struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
	struct crypto_shash *md5; /* md5 hash function */
	struct sdesc *sdeschmacmd5;  /* ctxt to generate ntlmv2 hash, CR1 */
	struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
};

/* per smb session structure/fields */
struct ntlmssp_auth {
	__u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
	__u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
	unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
	char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
};

struct cifs_cred {
	int uid;
	int gid;
	int mode;
	int cecount;
	struct cifs_sid osid;
	struct cifs_sid gsid;
	struct cifs_ntace *ntaces;
	struct cifs_ace *aces;
};

/*
 *****************************************************************
 * Except the CIFS PDUs themselves all the
 * globally interesting structs should go here
 *****************************************************************
 */

enum smb_version {
	Smb_1 = 1,
};

struct mid_q_entry;
struct TCP_Server_Info;
struct cifsFileInfo;
struct cifs_ses;

struct smb_version_operations {
	int (*send_cancel)(struct TCP_Server_Info *, void *,
			   struct mid_q_entry *);
	bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
	/* setup request: allocate mid, sign message */
	int (*setup_request)(struct cifs_ses *, struct kvec *, unsigned int,
			     struct mid_q_entry **);
	/* check response: verify signature, map error */
	int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
			     bool);
	void (*add_credits)(struct TCP_Server_Info *, const unsigned int);
	void (*set_credits)(struct TCP_Server_Info *, const int);
	int * (*get_credits_field)(struct TCP_Server_Info *);
	/* data offset from read response message */
	unsigned int (*read_data_offset)(char *);
	/* data length from read response message */
	unsigned int (*read_data_length)(char *