2005-04-17 00:20:36 +02:00
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/*
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* fs/cifs/cifsglob.h
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*
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2005-04-29 07:41:09 +02:00
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* Copyright (C) International Business Machines Corp., 2002,2005
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2005-04-17 00:20:36 +02:00
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* Author(s): Steve French (sfrench@us.ibm.com)
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU Lesser General Public License for more details.
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*
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*/
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#include <linux/in.h>
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#include <linux/in6.h>
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#include "cifs_fs_sb.h"
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/*
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* The sizes of various internal tables and strings
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*/
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#define MAX_UID_INFO 16
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#define MAX_SES_INFO 2
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#define MAX_TCON_INFO 4
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#define MAX_TREE_SIZE 2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1
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#define MAX_SERVER_SIZE 15
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#define MAX_SHARE_SIZE 64 /* used to be 20 - this should still be enough */
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#define MAX_USERNAME_SIZE 32 /* 32 is to allow for 15 char names + null
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termination then *2 for unicode versions */
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#define MAX_PASSWORD_SIZE 16
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#define CIFS_MIN_RCV_POOL 4
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/*
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* MAX_REQ is the maximum number of requests that WE will send
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* on one socket concurently. It also matches the most common
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* value of max multiplex returned by servers. We may
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* eventually want to use the negotiated value (in case
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* future servers can handle more) when we are more confident that
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* we will not have problems oveloading the socket with pending
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* write data.
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*/
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#define CIFS_MAX_REQ 50
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#define SERVER_NAME_LENGTH 15
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#define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
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/* used to define string lengths for reversing unicode strings */
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/* (256+1)*2 = 514 */
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/* (max path length + 1 for null) * 2 for unicode */
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#define MAX_NAME 514
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#include "cifspdu.h"
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#ifndef FALSE
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#define FALSE 0
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#endif
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#ifndef TRUE
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#define TRUE 1
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#endif
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#ifndef XATTR_DOS_ATTRIB
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#define XATTR_DOS_ATTRIB "user.DOSATTRIB"
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#endif
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/*
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* This information is kept on every Server we know about.
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*
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* Some things to note:
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*
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*/
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#define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
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/*
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* CIFS vfs client Status information (based on what we know.)
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*/
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/* associated with each tcp and smb session */
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enum statusEnum {
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CifsNew = 0,
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CifsGood,
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CifsExiting,
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CifsNeedReconnect
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};
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enum securityEnum {
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NTLM = 0, /* Legacy NTLM012 auth with NTLM hash */
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NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
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RawNTLMSSP, /* NTLMSSP without SPNEGO */
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NTLMSSP, /* NTLMSSP via SPNEGO */
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Kerberos /* Kerberos via SPNEGO */
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};
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enum protocolEnum {
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IPV4 = 0,
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IPV6,
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SCTP
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/* Netbios frames protocol not supported at this time */
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};
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/*
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*****************************************************************
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* Except the CIFS PDUs themselves all the
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* globally interesting structs should go here
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*****************************************************************
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*/
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struct TCP_Server_Info {
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2005-08-19 20:04:29 +02:00
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char server_Name[SERVER_NAME_LEN_WITH_NULL]; /* 15 chars + X'20' 16th */
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char unicode_server_Name[SERVER_NAME_LEN_WITH_NULL * 2];
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2005-04-17 00:20:36 +02:00
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struct socket *ssocket;
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union {
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struct sockaddr_in sockAddr;
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struct sockaddr_in6 sockAddr6;
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} addr;
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wait_queue_head_t response_q;
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wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
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struct list_head pending_mid_q;
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void *Server_NlsInfo; /* BB - placeholder for future NLS info */
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unsigned short server_codepage; /* codepage for the server */
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unsigned long ip_address; /* IP addr for the server if known */
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enum protocolEnum protocolType;
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char versionMajor;
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char versionMinor;
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unsigned svlocal:1; /* local server or remote */
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atomic_t socketUseCount; /* number of open cifs sessions on socket */
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atomic_t inFlight; /* number of requests on the wire to server */
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enum statusEnum tcpStatus; /* what we think the status is */
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struct semaphore tcpSem;
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struct task_struct *tsk;
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char server_GUID[16];
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char secMode;
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enum securityEnum secType;
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unsigned int maxReq; /* Clients should submit no more */
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/* than maxReq distinct unanswered SMBs to the server when using */
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/* multiplexed reads or writes */
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unsigned int maxBuf; /* maxBuf specifies the maximum */
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/* message size the server can send or receive for non-raw SMBs */
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unsigned int maxRw; /* maxRw specifies the maximum */
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/* message size the server can send or receive for */
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/* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
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char sessid[4]; /* unique token id for this session */
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/* (returned on Negotiate */
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int capabilities; /* allow selective disabling of caps by smb sess */
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__u16 timeZone;
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2005-08-17 21:38:22 +02:00
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__u16 CurrentMid; /* multiplex id - rotating counter */
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2005-04-17 00:20:36 +02:00
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char cryptKey[CIFS_CRYPTO_KEY_SIZE];
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char workstation_RFC1001_name[16]; /* 16th byte is always zero */
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2005-04-29 07:41:05 +02:00
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__u32 sequence_number; /* needed for CIFS PDU signature */
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char mac_signing_key[CIFS_SESSION_KEY_SIZE + 16];
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2005-04-17 00:20:36 +02:00
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};
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/*
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* The following is our shortcut to user information. We surface the uid,
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* and name. We always get the password on the fly in case it
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* has changed. We also hang a list of sessions owned by this user off here.
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*/
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struct cifsUidInfo {
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struct list_head userList;
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struct list_head sessionList; /* SMB sessions for this user */
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uid_t linux_uid;
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char user[MAX_USERNAME_SIZE + 1]; /* ascii name of user */
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/* BB may need ptr or callback for PAM or WinBind info */
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};
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/*
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* Session structure. One of these for each uid session with a particular host
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*/
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struct cifsSesInfo {
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struct list_head cifsSessionList;
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struct semaphore sesSem;
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struct cifsUidInfo *uidInfo; /* pointer to user info */
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struct TCP_Server_Info *server; /* pointer to server info */
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atomic_t inUse; /* # of mounts (tree connections) on this ses */
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enum statusEnum status;
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__u16 ipc_tid; /* special tid for connection to IPC share */
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__u16 flags;
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2005-04-29 07:41:05 +02:00
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char *serverOS; /* name of operating system underlying server */
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char *serverNOS; /* name of network operating system of server */
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2005-04-17 00:20:36 +02:00
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char *serverDomain; /* security realm of server */
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int Suid; /* remote smb uid */
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uid_t linux_uid; /* local Linux uid */
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int capabilities;
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2005-04-29 07:41:05 +02:00
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char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
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TCP names - will ipv6 and sctp addresses fit? */
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2005-04-17 00:20:36 +02:00
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char userName[MAX_USERNAME_SIZE + 1];
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char domainName[MAX_USERNAME_SIZE + 1];
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char * password;
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};
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/* session flags */
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#define CIFS_SES_NT4 1
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/*
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* there is one of these for each connection to a resource on a particular
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* session
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*/
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struct cifsTconInfo {
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struct list_head cifsConnectionList;
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struct list_head openFileList;
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struct semaphore tconSem;
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struct cifsSesInfo *ses; /* pointer to session associated with */
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char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource (in ASCII not UTF) */
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char *nativeFileSystem;
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__u16 tid; /* The 2 byte tree id */
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__u16 Flags; /* optional support bits */
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enum statusEnum tidStatus;
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atomic_t useCount; /* how many mounts (explicit or implicit) to this share */
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#ifdef CONFIG_CIFS_STATS
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atomic_t num_smbs_sent;
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atomic_t num_writes;
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atomic_t num_reads;
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atomic_t num_oplock_brks;
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atomic_t num_opens;
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atomic_t num_deletes;
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atomic_t num_mkdirs;
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atomic_t num_rmdirs;
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atomic_t num_renames;
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atomic_t num_t2renames;
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2005-06-23 02:13:47 +02:00
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atomic_t num_ffirst;
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atomic_t num_fnext;
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atomic_t num_fclose;
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2005-04-17 00:20:36 +02:00
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__u64 bytes_read;
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__u64 bytes_written;
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spinlock_t stat_lock;
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#endif
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FILE_SYSTEM_DEVICE_INFO fsDevInfo;
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FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if file system name truncated */
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FILE_SYSTEM_UNIX_INFO fsUnixInfo;
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unsigned retry:1;
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2005-08-19 20:04:29 +02:00
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unsigned nocase:1;
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2005-04-17 00:20:36 +02:00
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/* BB add field for back pointer to sb struct? */
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};
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/*
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* This info hangs off the cifsFileInfo structure. This is used to track
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* byte stream locks on the file
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*/
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struct cifsLockInfo {
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struct cifsLockInfo *next;
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int start;
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int length;
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int type;
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};
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/*
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* One of these for each open instance of a file
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*/
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struct cifs_search_info {
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loff_t index_of_last_entry;
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__u16 entries_in_buffer;
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__u16 info_level;
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__u32 resume_key;
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char * ntwrk_buf_start;
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char * srch_entries_start;
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char * presume_name;
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unsigned int resume_name_len;
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unsigned endOfSearch:1;
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unsigned emptyDir:1;
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unsigned unicode:1;
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};
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struct cifsFileInfo {
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struct list_head tlist; /* pointer to next fid owned by tcon */
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struct list_head flist; /* next fid (file instance) for this inode */
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unsigned int uid; /* allows finding which FileInfo structure */
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__u32 pid; /* process id who opened file */
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__u16 netfid; /* file id from remote */
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/* BB add lock scope info here if needed */ ;
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/* lock scope id (0 if none) */
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struct file * pfile; /* needed for writepage */
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struct inode * pInode; /* needed for oplock break */
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unsigned closePend:1; /* file is marked to close */
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unsigned invalidHandle:1; /* file closed via session abend */
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struct semaphore fh_sem; /* prevents reopen race after dead ses*/
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char * search_resume_name; /* BB removeme BB */
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unsigned int resume_name_length; /* BB removeme - field renamed and moved BB */
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struct cifs_search_info srch_inf;
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};
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/*
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* One of these for each file inode
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*/
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struct cifsInodeInfo {
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struct list_head lockList;
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/* BB add in lists for dirty pages - i.e. write caching info for oplock */
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struct list_head openFileList;
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int write_behind_rc;
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__u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
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atomic_t inUse; /* num concurrent users (local openers cifs) of file*/
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unsigned long time; /* jiffies of last update/check of inode */
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unsigned clientCanCacheRead:1; /* read oplock */
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unsigned clientCanCacheAll:1; /* read and writebehind oplock */
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unsigned oplockPending:1;
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struct inode vfs_inode;
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};
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static inline struct cifsInodeInfo *
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CIFS_I(struct inode *inode)
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{
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return container_of(inode, struct cifsInodeInfo, vfs_inode);
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}
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static inline struct cifs_sb_info *
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CIFS_SB(struct super_block *sb)
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{
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return sb->s_fs_info;
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}
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2005-06-23 02:26:35 +02:00
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static inline const char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
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{
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
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return '/';
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else
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return '\\';
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}
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2005-04-17 00:20:36 +02:00
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/* one of these for every pending CIFS request to the server */
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struct mid_q_entry {
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struct list_head qhead; /* mids waiting on reply from this server */
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__u16 mid; /* multiplex id */
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__u16 pid; /* process id */
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__u32 sequence_number; /* for CIFS signing */
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struct timeval when_sent; /* time when smb sent */
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struct cifsSesInfo *ses; /* smb was sent to this server */
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struct task_struct *tsk; /* task waiting for response */
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struct smb_hdr *resp_buf; /* response buffer */
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int midState; /* wish this were enum but can not pass to wait_event */
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2005-04-29 07:41:07 +02:00
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__u8 command; /* smb command code */
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unsigned multiPart:1; /* multiple responses to one SMB request */
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unsigned largeBuf:1; /* if valid response, is pointer to large buf */
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2005-04-29 07:41:09 +02:00
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unsigned multiResp:1; /* multiple trans2 responses for one request */
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2005-04-17 00:20:36 +02:00
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};
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struct oplock_q_entry {
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struct list_head qhead;
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struct inode * pinode;
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struct cifsTconInfo * tcon;
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__u16 netfid;
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};
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#define MID_FREE 0
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#define MID_REQUEST_ALLOCATED 1
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#define MID_REQUEST_SUBMITTED 2
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#define MID_RESPONSE_RECEIVED 4
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#define MID_RETRY_NEEDED 8 /* session closed while this request out */
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#define MID_NO_RESP_NEEDED 0x10
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#define MID_SMALL_BUFFER 0x20 /* 112 byte response buffer instead of 4K */
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/*
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*****************************************************************
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* All constants go here
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*****************************************************************
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*/
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#define UID_HASH (16)
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/*
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* Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
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* following to be declared.
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*/
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/****************************************************************************
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* Locking notes. All updates to global variables and lists should be
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* protected by spinlocks or semaphores.
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*
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* Spinlocks
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* ---------
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* GlobalMid_Lock protects:
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* list operations on pending_mid_q and oplockQ
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* updates to XID counters, multiplex id and SMB sequence numbers
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* GlobalSMBSesLock protects:
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* list operations on tcp and SMB session lists and tCon lists
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* f_owner.lock protects certain per file struct operations
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* mapping->page_lock protects certain per page operations
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*
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* Semaphores
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* ----------
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* sesSem operations on smb session
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* tconSem operations on tree connection
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* fh_sem file handle reconnection operations
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*
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****************************************************************************/
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#ifdef DECLARE_GLOBALS_HERE
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#define GLOBAL_EXTERN
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#else
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#define GLOBAL_EXTERN extern
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#endif
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/*
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* The list of servers that did not respond with NT LM 0.12.
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* This list helps improve performance and eliminate the messages indicating
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* that we had a communications error talking to the server in this list.
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*/
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GLOBAL_EXTERN struct servers_not_supported *NotSuppList; /*@z4a */
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/*
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* The following is a hash table of all the users we know about.
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*/
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GLOBAL_EXTERN struct smbUidInfo *GlobalUidList[UID_HASH];
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GLOBAL_EXTERN struct list_head GlobalServerList; /* BB not implemented yet */
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GLOBAL_EXTERN struct list_head GlobalSMBSessionList;
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GLOBAL_EXTERN struct list_head GlobalTreeConnectionList;
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GLOBAL_EXTERN rwlock_t GlobalSMBSeslock; /* protects list inserts on 3 above */
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GLOBAL_EXTERN struct list_head GlobalOplock_Q;
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/*
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* Global transaction id (XID) information
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|
*/
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GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
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GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
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GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
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GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above and list operations */
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|
/* on midQ entries */
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|
GLOBAL_EXTERN char Local_System_Name[15];
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|
|
/*
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|
|
* Global counters, updated atomically
|
|
|
|
*/
|
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|
|
GLOBAL_EXTERN atomic_t sesInfoAllocCount;
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|
|
GLOBAL_EXTERN atomic_t tconInfoAllocCount;
|
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|
|
GLOBAL_EXTERN atomic_t tcpSesAllocCount;
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|
|
GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
|
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|
|
GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
|
|
|
|
|
|
|
|
/* Various Debug counters to remove someday (BB) */
|
|
|
|
GLOBAL_EXTERN atomic_t bufAllocCount;
|
|
|
|
GLOBAL_EXTERN atomic_t smBufAllocCount;
|
|
|
|
GLOBAL_EXTERN atomic_t midCount;
|
|
|
|
|
|
|
|
/* Misc globals */
|
|
|
|
GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions
|
|
|
|
to be established on existing mount if we
|
|
|
|
have the uid/password or Kerberos credential
|
|
|
|
or equivalent for current user */
|
|
|
|
GLOBAL_EXTERN unsigned int oplockEnabled;
|
|
|
|
GLOBAL_EXTERN unsigned int experimEnabled;
|
|
|
|
GLOBAL_EXTERN unsigned int lookupCacheEnabled;
|
|
|
|
GLOBAL_EXTERN unsigned int extended_security; /* if on, session setup sent
|
|
|
|
with more secure ntlmssp2 challenge/resp */
|
|
|
|
GLOBAL_EXTERN unsigned int ntlmv2_support; /* better optional password hash */
|
|
|
|
GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
|
|
|
|
GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
|
|
|
|
GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
|
|
|
|
GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
|
|
|
|
GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
|
|
|
|
GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
|
|
|
|
|