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.
 *
 */
#include <linux/in.h>
#include <linux/in6.h>
#include "cifs_fs_sb.h"
#include "cifsacl.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  64	/* used to be 20, this should still be enough */
#define MAX_USERNAME_SIZE 32	/* 32 is to allow for 15 char names + null
				   termination then *2 for unicode versions */
#define MAX_PASSWORD_SIZE 16

#define CIFS_MIN_RCV_POOL 4

/*
 * MAX_REQ is the maximum number of requests that WE will send
 * on one socket concurently. It also matches the most common
 * value of max multiplex returned by servers.  We may
 * eventually want to use the negotiated value (in case
 * future servers can handle more) when we are more confident that
 * we will not have problems oveloading the socket with pending
 * write data.
 */
#define CIFS_MAX_REQ 50

#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
};

enum securityEnum {
	PLAINTXT = 0, 		/* Legacy with Plaintext passwords */
	LANMAN,			/* 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 */
	MSKerberos,		/* MS Kerberos via SPNEGO */
};

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

struct mac_key {
	unsigned int len;
	union {
		char ntlm[CIFS_SESS_KEY_SIZE + 16];
		char krb5[CIFS_SESS_KEY_SIZE + 16]; /* BB: length correct? */
		struct {
			char key[16];
			struct ntlmv2_resp resp;
		} ntlmv2;
	} data;
};

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
 *****************************************************************
 */

struct TCP_Server_Info {
	struct list_head tcp_ses_list;
	struct list_head smb_ses_list;
	int srv_count; /* reference counter */
	/* 15 character server name + 0x20 16th byte indicating type = srv */
	char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
	char *hostname; /* hostname portion of UNC string */
	struct socket *ssocket;
	union {
		struct sockaddr_in sockAddr;
		struct sockaddr_in6 sockAddr6;
	} addr;
	wait_queue_head_t response_q;
	wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
	struct list_head pending_mid_q;
	void *Server_NlsInfo;	/* BB - placeholder for future NLS info  */
	unsigned short server_codepage;	/* codepage for the server    */
	unsigned long ip_address;	/* IP addr for the server if known */
	enum protocolEnum protocolType;
	char versionMajor;
	char versionMinor;
	bool svlocal:1;			/* local server or remote */
	bool noblocksnd;		/* use blocking sendmsg */
	bool noautotune;		/* do not autotune send buf sizes */
	atomic_t inFlight;  /* number of requests on the wire to server */
#ifdef CONFIG_CIFS_STATS2
	atomic_t inSend; /* requests trying to send */
	atomic_t num_waiters;   /* blocked waiting to get in sendrecv */
#endif
	enum statusEnum tcpStatus; /* what we think the status is */
	struct mutex srv_mutex;
	struct task_struct *tsk;
	char server_GUID[16];
	char secMode;
	enum securityEnum secType;
	unsigned int maxReq;	/* Clients should submit no more */
	/* than maxReq distinct unanswered SMBs to the server when using  */
	/* multiplexed reads or writes */
	unsigned int maxBuf;	/* maxBuf specifies the maximum */
	/* message size the server can send or receive for non-raw SMBs */
	unsigned int max_rw;	/* maxRw specifies the maximum */
	/* message size the server can send or receive for */
	/* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
	unsigned int max_vcs;	/* maximum number of smb sessions, at least
				   those that can be specified uniquely with
				   vcnumbers */
	char sessid[4];		/* unique token id for this session */
	/* (returned on Negotiate */
	int capabilities; /* allow selective disabling of caps by smb sess */
	int timeAdj;  /* Adjust for difference in server time zone in sec */
	__u16 CurrentMid;         /* multiplex id - rotating counter */
	char cryptKey[CIFS_CRYPTO_KEY_SIZE];
	/* 16th byte of RFC1001 workstation name is always null */
	char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
	__u32 sequence_number; /* needed for CIFS PDU signature */
	struct mac_key mac_signing_key;
	char ntlmv2_hash[16];
	unsigned long lstrp; /* when we got last response from this server */
};

/*
 * The following is our shortcut to user information.  We surface the uid,
 * and name. We always get the password on the fly in case it
 * has changed. We also hang a list of sessions owned by this user off here.
 */
struct cifsUidInfo {
	struct list_head userList;
	struct list_head sessionList; /* SMB sessions for this user */
	uid_t linux_uid;
	char user[MAX_USERNAME_SIZE + 1];	/* ascii name of user */
	/* BB may need ptr or callback for PAM or WinBind info */
};

/*
 * Session structure.  One of these for each uid session with a particular host
 */
struct cifsSesInfo {
	struct list_head smb_ses_list;
	struct list_head tcon_list;
	struct semaphore sesSem;
#if 0
	struct cifsUidInfo *uidInfo;	/* pointer to user info */
#endif
	struct TCP_Server_Info *server;	/* pointer to server info */
	int ses_count;		/* reference counter */
	enum statusEnum status;
	unsigned overrideSecFlg;  /* if non-zero override global sec flags */
	__u16 ipc_tid;		/* special tid for connection to IPC share */
	__u16 flags;
	__u16 vcnum;
	char *serverOS;		/* name of operating system underlying server */
	char *serverNOS;	/* name of network operating system of server */
	char *serverDomain;	/* security realm of server */
	int Suid;		/* remote smb uid  */
	uid_t linux_uid;        /* local Linux uid */
	int capabilities;
	char serverName[SERVER_NAME_LEN_WITH_NULL * 2];	/* BB make bigger for
				TCP names - will ipv6 and sctp addresses fit? */
	char userName[MAX_USERNAME_SIZE + 1];
	char *domainName;
	char *password;
	bool need_reconnect:1; /* connection reset, uid now invalid */
};
/* no more than one of the following three session flags may be set */
#define CIFS_SES_NT4 1
#define CIFS_SES_OS2 2
#define CIFS_SES_W9X 4
/* following flag is set for old servers such as OS2 (and Win95?)
   which do not negotiate NTLM or POSIX dialects, but instead
   negotiate one of the older LANMAN dialects */
#define CIFS_SES_LANMAN 8
/*
 * there is one of these for each connection to a resource on a particular
 * session
 */
struct cifsTconInfo {
	struct list_head tcon_list;
	int tc_count;
	struct list_head openFileList;
	struct cifsSesInfo *ses;	/* pointer to session associated with */
	char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
	char *nativeFileSystem;
	char *password;		/* for share-level security */
	__u16 tid;		/* The 2 byte tree id */
	__u16 Flags;		/* optional support bits */
	enum statusEnum tidStatus;
#ifdef CONFIG_CIFS_STATS
	atomic_t num_smbs_sent;
	atomic_t num_writes;
	atomic_t num_reads;
	atomic_t num_flushes;
	atomic_t num_oplock_brks;
	atomic_t num_opens;
	atomic_t num_closes;
	atomic_t num_deletes;
	atomic_t num_mkdirs;
	atomic_t num_rmdirs;
	atomic_t num_renames;
	atomic_t num_t2renames;
	atomic_t num_ffirst;
	atomic_t num_fnext;
	atomic_t num_fclose;
	atomic_t num_hardlinks;
	atomic_t num_symlinks;
	atomic_t num_locks;
	atomic_t num_acl_get;
	atomic_t num_acl_set;
#ifdef CONFIG_CIFS_STATS2
	unsigned long long