netmisc.c

Linux内核自带的cifs模块

/*
 *   fs/cifs/netmisc.c
 *
 *   Copyright (c) International Business Machines  Corp., 2002
 *   Author(s): Steve French ([e-mail])
 *
 *   Error mapping routines from Samba libsmb/errormap.c
 *   Copyright (C) Andrew Tridgell 2001
 *
 *   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
 */

#include <linux/net.h>
#include <linux/string.h>
#include <linux/in.h>
#include <linux/ctype.h>
#include <linux/fs.h>
#include <asm/div64.h>
#include <asm/byteorder.h>
#include <linux/inet.h>
#include "cifsfs.h"
#include "cifspdu.h"
#include "cifsglob.h"
#include "cifsproto.h"
#include "smberr.h"
#include "cifs_debug.h"
#include "nterr.h"

struct smb_to_posix_error {
	__u16 smb_err;
	int posix_code;
};

static const struct smb_to_posix_error mapping_table_ERRDOS[] = {
	{ERRbadfunc, -EINVAL},
	{ERRbadfile, -ENOENT},
	{ERRbadpath, -ENOTDIR},
	{ERRnofids, -EMFILE},
	{ERRnoaccess, -EACCES},
	{ERRbadfid, -EBADF},
	{ERRbadmcb, -EIO},
	{ERRnomem, -ENOMEM},
	{ERRbadmem, -EFAULT},
	{ERRbadenv, -EFAULT},
	{ERRbadformat, -EINVAL},
	{ERRbadaccess, -EACCES},
	{ERRbaddata, -EIO},
	{ERRbaddrive, -ENXIO},
	{ERRremcd, -EACCES},
	{ERRdiffdevice, -EXDEV},
	{ERRnofiles, -ENOENT},
	{ERRbadshare, -ETXTBSY},
	{ERRlock, -EACCES},
	{ERRunsup, -EINVAL},
	{ERRnosuchshare, -ENXIO},
	{ERRfilexists, -EEXIST},
	{ERRinvparm, -EINVAL},
	{ERRdiskfull, -ENOSPC},
	{ERRinvname, -ENOENT},
	{ERRinvlevel, -EOPNOTSUPP},
	{ERRdirnotempty, -ENOTEMPTY},
	{ERRnotlocked, -ENOLCK},
	{ERRcancelviolation, -ENOLCK},
	{ERRalreadyexists, -EEXIST},
	{ERRmoredata, -EOVERFLOW},
	{ERReasnotsupported, -EOPNOTSUPP},
	{ErrQuota, -EDQUOT},
	{ErrNotALink, -ENOLINK},
	{ERRnetlogonNotStarted, -ENOPROTOOPT},
	{ErrTooManyLinks, -EMLINK},
	{0, 0}
};

static const struct smb_to_posix_error mapping_table_ERRSRV[] = {
	{ERRerror, -EIO},
	{ERRbadpw, -EACCES},  /* was EPERM */
	{ERRbadtype, -EREMOTE},
	{ERRaccess, -EACCES},
	{ERRinvtid, -ENXIO},
	{ERRinvnetname, -ENXIO},
	{ERRinvdevice, -ENXIO},
	{ERRqfull, -ENOSPC},
	{ERRqtoobig, -ENOSPC},
	{ERRqeof, -EIO},
	{ERRinvpfid, -EBADF},
	{ERRsmbcmd, -EBADRQC},
	{ERRsrverror, -EIO},
	{ERRbadBID, -EIO},
	{ERRfilespecs, -EINVAL},
	{ERRbadLink, -EIO},
	{ERRbadpermits, -EINVAL},
	{ERRbadPID, -ESRCH},
	{ERRsetattrmode, -EINVAL},
	{ERRpaused, -EHOSTDOWN},
	{ERRmsgoff, -EHOSTDOWN},
	{ERRnoroom, -ENOSPC},
	{ERRrmuns, -EUSERS},
	{ERRtimeout, -ETIME},
	{ERRnoresource, -ENOBUFS},
	{ERRtoomanyuids, -EUSERS},
	{ERRbaduid, -EACCES},
	{ERRusempx, -EIO},
	{ERRusestd, -EIO},
	{ERR_NOTIFY_ENUM_DIR, -ENOBUFS},
	{ERRaccountexpired, -EACCES},
	{ERRbadclient, -EACCES},
	{ERRbadLogonTime, -EACCES},
	{ERRpasswordExpired, -EACCES},
	{ERRnosupport, -EINVAL},
	{0, 0}
};

static const struct smb_to_posix_error mapping_table_ERRHRD[] = {
	{0, 0}
};

/* Convert string containing dotted ip address to binary form */
/* returns 0 if invalid address */

int
cifs_inet_pton(int address_family, char *cp, void *dst)
{
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,19)
	int ret = 0;

	/* calculate length by finding first slash or NULL */
	/* BB Should we convert '/' slash to '\' here since it seems already
	 * done before this */
	if ( address_family == AF_INET ) {
		ret = in4_pton(cp, -1 /* len */, dst , '\\', NULL);
	} else if ( address_family == AF_INET6 ) {
		ret = in6_pton(cp, -1 /* len */, dst , '\\', NULL);
	}
#ifdef CONFIG_CIFS_DEBUG2
	cFYI(1, ("address conversion returned %d for %s", ret, cp));
#endif
	if (ret > 0)
		ret = 1;
	return ret;
#else /* pre-2.6.20 */
	int value;
	int digit;
	int i;
	char temp;
	char bytes[4];
	char *end = bytes;
	static const int addr_class_max[4] =
	    { 0xffffffff, 0xffffff, 0xffff, 0xff };

	if(address_family != AF_INET)
		return -EAFNOSUPPORT;

	for (i = 0; i < 4; i++) {
		bytes[i] = 0;
	}

	temp = *cp;

	while (TRUE) {
		if (!isdigit(temp))
			return 0;

		value = 0;
		digit = 0;
		for (;;) {
			if (isascii(temp) && isdigit(temp)) {
				value = (value * 10) + temp - '0';
				temp = *++cp;
				digit = 1;
			} else
				break;
		}

		if (temp == '.') {
			if ((end > bytes + 2) || (value > 255))
				return 0;
			*end++ = value;
			temp = *++cp;
		} else if (temp == ':') {
			cFYI(1,("IPv6 addresses not supported for CIFS mounts yet"));
			return -1;
		} else
			break;
	}

	/* check for last characters */
	if (temp != '\0' && (!isascii(temp) || !isspace(temp)))
		if (temp != '\\') {
			if (temp != '/')
				return 0;
			else
				(*cp = '\\');	/* switch the slash the expected way */
		}
	if (value > addr_class_max[end - bytes])
		return 0;

	*((__be32 *)dst) = *((__be32 *) bytes) | htonl(value);
	return 1; /* success */
#endif
}

/*****************************************************************************
convert a NT status code to a dos class/code
 *****************************************************************************/
/* NT status -> dos error map */
static const struct {
	__u8 dos_class;
	__u16 dos_code;
	__u32 ntstatus;
} ntstatus_to_dos_map[] = {
	{
	ERRDOS, ERRgeneral, NT_STATUS_UNSUCCESSFUL}, {
	ERRDOS, ERRbadfunc, NT_STATUS_NOT_IMPLEMENTED}, {
	ERRDOS, ERRinvlevel, NT_STATUS_INVALID_INFO_CLASS}, {
	ERRDOS, 24, NT_STATUS_INFO_LENGTH_MISMATCH}, {
	ERRHRD, ERRgeneral, NT_STATUS_ACCESS_VIOLATION}, {
	ERRHRD, ERRgeneral, NT_STATUS_IN_PAGE_ERROR}, {
	ERRHRD, ERRgeneral, NT_STATUS_PAGEFILE_QUOTA}, {
	ERRDOS, ERRbadfid, NT_STATUS_INVALID_HANDLE}, {
	ERRHRD, ERRgeneral, NT_STATUS_BAD_INITIAL_STACK}, {
	ERRDOS, 193, NT_STATUS_BAD_INITIAL_PC}, {
	ERRDOS, 87, NT_STATUS_INVALID_CID}, {
	ERRHRD, ERRgeneral, NT_STATUS_TIMER_NOT_CANCELED}, {
	ERRDOS, 87, NT_STATUS_INVALID_PARAMETER}, {
	ERRDOS, ERRbadfile, NT_STATUS_NO_SUCH_DEVICE}, {
	ERRDOS, ERRbadfile, NT_STATUS_NO_SUCH_FILE}, {
	ERRDOS, ERRbadfunc, NT_STATUS_INVALID_DEVICE_REQUEST}, {
	ERRDOS, 38, NT_STATUS_END_OF_FILE}, {
	ERRDOS, 34, NT_STATUS_WRONG_VOLUME}, {
	ERRDOS, 21, NT_STATUS_NO_MEDIA_IN_DEVICE}, {
	ERRHRD, ERRgeneral, NT_STATUS_UNRECOGNIZED_MEDIA}, {
	ERRDOS, 27, NT_STATUS_NONEXISTENT_SECTOR},
/*	{ This NT error code was 'sqashed'
	 from NT_STATUS_MORE_PROCESSING_REQUIRED to NT_STATUS_OK
	 during the session setup } */
	{
	ERRDOS, ERRnomem, NT_STATUS_NO_MEMORY}, {
	ERRDOS, 487, NT_STATUS_CONFLICTING_ADDRESSES}, {
	ERRDOS, 487, NT_STATUS_NOT_MAPPED_VIEW}, {
	ERRDOS, 87, NT_STATUS_UNABLE_TO_FREE_VM}, {
	ERRDOS, 87, NT_STATUS_UNABLE_TO_DELETE_SECTION}, {
	ERRDOS, 2142, NT_STATUS_INVALID_SYSTEM_SERVICE}, {
	ERRHRD, ERRgeneral, NT_STATUS_ILLEGAL_INSTRUCTION}, {
	ERRDOS, ERRnoaccess, NT_STATUS_INVALID_LOCK_SEQUENCE}, {
	ERRDOS, ERRnoaccess, NT_STATUS_INVALID_VIEW_SIZE}, {
	ERRDOS, 193, NT_STATUS_INVALID_FILE_FOR_SECTION}, {
	ERRDOS, ERRnoaccess, NT_STATUS_ALREADY_COMMITTED},
/*	{ This NT error code was 'sqashed'
	 from NT_STATUS_ACCESS_DENIED to NT_STATUS_TRUSTED_RELATIONSHIP_FAILURE
	 during the session setup }   */
	{
	ERRDOS, ERRnoaccess, NT_STATUS_ACCESS_DENIED}, {
	ERRDOS, 111, NT_STATUS_BUFFER_TOO_SMALL}, {
	ERRDOS, ERRbadfid, NT_STATUS_OBJECT_TYPE_MISMATCH}, {
	ERRHRD, ERRgeneral, NT_STATUS_NONCONTINUABLE_EXCEPTION}, {
	ERRHRD, ERRgeneral, NT_STATUS_INVALID_DISPOSITION}, {
	ERRHRD, ERRgeneral, NT_STATUS_UNWIND}, {
	ERRHRD, ERRgeneral, NT_STATUS_BAD_STACK}, {
	ERRHRD, ERRgeneral, NT_STATUS_INVALID_UNWIND_TARGET}, {
	ERRDOS, 158, NT_STATUS_NOT_LOCKED}, {
	ERRHRD, ERRgeneral, NT_STATUS_PARITY_ERROR}, {
	ERRDOS, 487, NT_STATUS_UNABLE_TO_DECOMMIT_VM}, {
	ERRDOS, 487, NT_STATUS_NOT_COMMITTED}, {
	ERRHRD, ERRgeneral, NT_STATUS_INVALID_PORT_ATTRIBUTES}, {
	ERRHRD, ERRgeneral, NT_STATUS_PORT_MESSAGE_TOO_LONG}, {
	ERRDOS, 87, NT_STATUS_INVALID_PARAMETER_MIX}, {
	ERRHRD, ERRgeneral, NT_STATUS_INVALID_QUOTA_LOWER}, {
	ERRHRD, ERRgeneral, NT_STATUS_DISK_CORRUPT_ERROR}, {
	ERRDOS, ERRbadfile, NT_STATUS_OBJECT_NAME_INVALID}, {	/* mapping changed since shell does lookup on * and expects file not found */
	ERRDOS, ERRbadfile, NT_STATUS_OBJECT_NAME_NOT_FOUND}, {
	ERRDOS, ERRalreadyexists, NT_STATUS_OBJECT_NAME_COLLISION}, {
	ERRHRD, ERRgeneral, NT_STATUS_HANDLE_NOT_WAITABLE}, {
	ERRDOS, ERRbadfid, NT_STATUS_PORT_DISCONNECTED}, {
	ERRHRD, ERRgeneral, NT_STATUS_DEVICE_ALREADY_ATTACHED}, {
	ERRDOS, 161, NT_STATUS_OBJECT_PATH_INVALID}, {
	ERRDOS, ERRbadpath, NT_STATUS_OBJECT_PATH_NOT_FOUND}, {
	ERRDOS, 161, NT_STATUS_OBJECT_PATH_SYNTAX_BAD}, {
	ERRHRD, ERRgeneral, NT_STATUS_DATA_OVERRUN}, {
	ERRHRD, ERRgeneral, NT_STATUS_DATA_LATE_ERROR}, {
	ERRDOS, 23, NT_STATUS_DATA_ERROR}, {
	ERRDOS, 23, NT_STATUS_CRC_ERROR}, {
	ERRDOS, ERRnomem, NT_STATUS_SECTION_TOO_BIG}, {
	ERRDOS, ERRnoaccess, NT_STATUS_PORT_CONNECTION_REFUSED}, {
	ERRDOS, ERRbadfid, NT_STATUS_INVALID_PORT_HANDLE}, {
	ERRDOS, ERRbadshare, NT_STATUS_SHARING_VIOLATION}, {
	ERRHRD, ERRgeneral, NT_STATUS_QUOTA_EXCEEDED}, {
	ERRDOS, 87, NT_STATUS_INVALID_PAGE_PROTECTION}, {
	ERRDOS, 288, NT_STATUS_MUTANT_NOT_OWNED}, {
	ERRDOS, 298, NT_STATUS_SEMAPHORE_LIMIT_EXCEEDED}, {
	ERRDOS, 87, NT_STATUS_PORT_ALREADY_SET}, {
	ERRDOS, 87, NT_STATUS_SECTION_NOT_IMAGE}, {
	ERRDOS, 156, NT_STATUS_SUSPEND_COUNT_EXCEEDED}, {
	ERRDOS, ERRnoaccess, NT_STATUS_THREAD_IS_TERMINATING}, {
	ERRDOS, 87, NT_STATUS_BAD_WORKING_SET_LIMIT}, {
	ERRDOS, 87, NT_STATUS_INCOMPATIBLE_FILE_MAP}, {
	ERRDOS, 87, NT_STATUS_SECTION_PROTECTION}, {
	ERRDOS, ERReasnotsupported, NT_STATUS_EAS_NOT_SUPPORTED}, {
	ERRDOS, 255, NT_STATUS_EA_TOO_LARGE}, {
	ERRHRD, ERRgeneral, NT_STATUS_NONEXISTENT_EA_ENTRY}, {
	ERRHRD, ERRgeneral, NT_STATUS_NO_EAS_ON_FILE}, {
	ERRHRD, ERRgeneral, NT_STATUS_EA_CORRUPT_ERROR}, {
	ERRDOS, ERRlock, NT_STATUS_FILE_LOCK_CONFLICT}, {
	ERRDOS, ERRlock, NT_STATUS_LOCK_NOT_GRANTED}, {
	ERRDOS, ERRbadfile, NT_STATUS_DELETE_PENDING}, {
	ERRDOS, ERRunsup, NT_STATUS_CTL_FILE_NOT_SUPPORTED}, {
	ERRHRD, ERRgeneral, NT_STATUS_UNKNOWN_REVISION}, {
	ERRHRD, ERRgeneral, NT_STATUS_REVISION_MISMATCH}, {
	ERRHRD, ERRgeneral, NT_STATUS_INVALID_OWNER}, {
	ERRHRD, ERRgeneral, NT_STATUS_INVALID_PRIMARY_GROUP}, {
	ERRHRD, ERRgeneral, NT_STATUS_NO_IMPERSONATION_TOKEN}, {
	ERRHRD, ERRgeneral, NT_STATUS_CANT_DISABLE_MANDATORY}, {
	ERRDOS, 2215, NT_STATUS_NO_LOGON_SERVERS}, {
	ERRHRD, ERRgeneral, NT_STATUS_NO_SUCH_LOGON_SESSION}, {
	ERRHRD, ERRgeneral, NT_STATUS_NO_SUCH_PRIVILEGE}, {
	ERRDOS, ERRnoaccess, NT_STATUS_PRIVILEGE_NOT_HELD}, {
	ERRHRD, ERRgeneral, NT_STATUS_INVALID_ACCOUNT_NAME}, {
	ERRHRD, ERRgeneral, NT_STATUS_USER_EXISTS},
/*	{ This NT error code was 'sqashed'
	 from NT_STATUS_NO_SUCH_USER to NT_STATUS_LOGON_FAILURE
	 during the session setup } */
	{
	ERRDOS, ERRnoaccess, NT_STATUS_NO_SUCH_USER}, {
	ERRHRD, ERRgeneral, NT_STATUS_GROUP_EXISTS}, {
	ERRHRD, ERRgeneral, NT_STATUS_NO_SUCH_GROUP}, {
	ERRHRD, ERRgeneral, NT_STATUS_MEMBER_IN_GROUP}, {
	ERRHRD, ERRgeneral, NT_STATUS_MEMBER_NOT_IN_GROUP}, {
	ERRHRD, ERRgeneral, NT_STATUS_LAST_ADMIN},
/*	{ This NT error code was 'sqashed'
	 from NT_STATUS_WRONG_PASSWORD to NT_STATUS_LOGON_FAILURE
	 during the session setup } */
	{
	ERRSRV, ERRbadpw, NT_STATUS_WRONG_PASSWORD}, {
	ERRHRD, ERRgeneral, NT_STATUS_ILL_FORMED_PASSWORD}, {
	ERRHRD, ERRgeneral, NT_STATUS_PASSWORD_RESTRICTION}, {
	ERRDOS, ERRnoaccess, NT_STATUS_LOGON_FAILURE}, {
	ERRHRD, ERRgeneral, NT_STATUS_ACCOUNT_RESTRICTION}, {
	ERRSRV, 2241, NT_STATUS_INVALID_LOGON_HOURS}, {
	ERRSRV, 2240, NT_STATUS_INVALID_WORKSTATION}, {
	ERRSRV, ERRpasswordExpired, NT_STATUS_PASSWORD_EXPIRED}, {
	ERRSRV, 2239, NT_STATUS_ACCOUNT_DISABLED}, {
	ERRHRD, ERRgeneral, NT_STATUS_NONE_MAPPED}, {
	ERRHRD, ERRgeneral, NT_STATUS_TOO_MANY_LUIDS_REQUESTED}, {
	ERRHRD, ERRgeneral, NT_STATUS_LUIDS_EXHAUSTED}, {
	ERRHRD, ERRgeneral, NT_STATUS_INVALID_SUB_AUTHORITY}, {
	ERRHRD, ERRgeneral, NT_STATUS_INVALID_ACL}, {