cifssmb.c

Linux Kernel 2.6.9 for OMAP1710

		goto createHardLinkRetry;

	return rc;
}

int
CIFSCreateHardLink(const int xid, struct cifsTconInfo *tcon,
		   const char *fromName, const char *toName,
		   const struct nls_table *nls_codepage)
{
	int rc = 0;
	NT_RENAME_REQ *pSMB = NULL;
	RENAME_RSP *pSMBr = NULL;
	int bytes_returned;
	int name_len, name_len2;
	__u16 count;

	cFYI(1, ("In CIFSCreateHardLink"));
winCreateHardLinkRetry:

	rc = smb_init(SMB_COM_NT_RENAME, 4, tcon, (void **) &pSMB,
		      (void **) &pSMBr);
	if (rc)
		return rc;

	pSMB->SearchAttributes =
	    cpu_to_le16(ATTR_READONLY | ATTR_HIDDEN | ATTR_SYSTEM |
			ATTR_DIRECTORY);
	pSMB->Flags = cpu_to_le16(CREATE_HARD_LINK);
	pSMB->ClusterCount = 0;

	pSMB->BufferFormat = 0x04;

	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
		name_len =
		    cifs_strtoUCS((wchar_t *) pSMB->OldFileName, fromName, 530
				  /* find define for this maxpathcomponent */
				  , nls_codepage);
		name_len++;	/* trailing null */
		name_len *= 2;
		pSMB->OldFileName[name_len] = 0;	/* pad */
		pSMB->OldFileName[name_len + 1] = 0x04; 
		name_len2 =
		    cifs_strtoUCS((wchar_t *) & pSMB->
				  OldFileName[name_len + 2], toName, 530,
				  nls_codepage);
		name_len2 += 1 /* trailing null */  + 1 /* Signature word */ ;
		name_len2 *= 2;	/* convert to bytes */
	} else {		/* BB improve the check for buffer overruns BB */
		name_len = strnlen(fromName, 530);
		name_len++;	/* trailing null */
		strncpy(pSMB->OldFileName, fromName, name_len);
		name_len2 = strnlen(toName, 530);
		name_len2++;	/* trailing null */
		pSMB->OldFileName[name_len] = 0x04;	/* 2nd buffer format */
		strncpy(&pSMB->OldFileName[name_len + 1], toName, name_len2);
		name_len2++;	/* trailing null */
		name_len2++;	/* signature byte */
	}

	count = 1 /* string type byte */  + name_len + name_len2;
	pSMB->hdr.smb_buf_length += count;
	pSMB->ByteCount = cpu_to_le16(count);

	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
	if (rc) {
		cFYI(1, ("Send error in hard link (NT rename) = %d", rc));
	}
	if (pSMB)
		cifs_buf_release(pSMB);
	if (rc == -EAGAIN)
		goto winCreateHardLinkRetry;

	return rc;
}

int
CIFSSMBUnixQuerySymLink(const int xid, struct cifsTconInfo *tcon,
			const unsigned char *searchName,
			char *symlinkinfo, const int buflen,
			const struct nls_table *nls_codepage)
{
/* SMB_QUERY_FILE_UNIX_LINK */
	TRANSACTION2_QPI_REQ *pSMB = NULL;
	TRANSACTION2_QPI_RSP *pSMBr = NULL;
	int rc = 0;
	int bytes_returned;
	int name_len;
	__u16 params, byte_count;

	cFYI(1, ("In QPathSymLinkInfo (Unix) for path %s", searchName));

querySymLinkRetry:
	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
		      (void **) &pSMBr);
	if (rc)
		return rc;

	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
		name_len =
		    cifs_strtoUCS((wchar_t *) pSMB->FileName, searchName, 530
				  /* find define for this maxpathcomponent */
				  , nls_codepage);
		name_len++;	/* trailing null */
		name_len *= 2;
	} else {		/* BB improve the check for buffer overruns BB */
		name_len = strnlen(searchName, 530);
		name_len++;	/* trailing null */
		strncpy(pSMB->FileName, searchName, name_len);
	}

	params = 2 /* level */  + 4 /* rsrvd */  + name_len /* incl null */ ;
	pSMB->TotalDataCount = 0;
	pSMB->MaxParameterCount = cpu_to_le16(2);
	/* BB find exact max data count below from sess structure BB */
	pSMB->MaxDataCount = cpu_to_le16(4000);
	pSMB->MaxSetupCount = 0;
	pSMB->Reserved = 0;
	pSMB->Flags = 0;
	pSMB->Timeout = 0;
	pSMB->Reserved2 = 0;
	pSMB->ParameterOffset = cpu_to_le16(offsetof(
        struct smb_com_transaction2_qpi_req ,InformationLevel) - 4);
	pSMB->DataCount = 0;
	pSMB->DataOffset = 0;
	pSMB->SetupCount = 1;
	pSMB->Reserved3 = 0;
	pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION);
	byte_count = params + 1 /* pad */ ;
	pSMB->TotalParameterCount = cpu_to_le16(params);
	pSMB->ParameterCount = pSMB->TotalParameterCount;
	pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FILE_UNIX_LINK);
	pSMB->Reserved4 = 0;
	pSMB->hdr.smb_buf_length += byte_count;
	pSMB->ByteCount = cpu_to_le16(byte_count);

	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
	if (rc) {
		cFYI(1, ("Send error in QuerySymLinkInfo = %d", rc));
	} else {		/* decode response */
		__u16 data_offset = le16_to_cpu(pSMBr->DataOffset);
		__u16 count = le16_to_cpu(pSMBr->DataCount);
		if ((pSMBr->ByteCount < 2) || (data_offset > 512))
		/* BB also check enough total bytes returned */
			rc = -EIO;	/* bad smb */
		else {
			if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE) {
				name_len = UniStrnlen((wchar_t *) ((char *)
					&pSMBr->hdr.Protocol +data_offset),
					min_t(const int, buflen,count) / 2);
				cifs_strfromUCS_le(symlinkinfo,
					(wchar_t *) ((char *)&pSMBr->hdr.Protocol +
						data_offset),
					name_len, nls_codepage);
			} else {
				strncpy(symlinkinfo,
					(char *) &pSMBr->hdr.Protocol + 
						data_offset,
					min_t(const int, buflen, count));
			}
			symlinkinfo[buflen] = 0;
	/* just in case so calling code does not go off the end of buffer */
		}
	}
	if (pSMB)
		cifs_buf_release(pSMB);
	if (rc == -EAGAIN)
		goto querySymLinkRetry;
	return rc;
}



int
CIFSSMBQueryReparseLinkInfo(const int xid, struct cifsTconInfo *tcon,
			const unsigned char *searchName,
			char *symlinkinfo, const int buflen,__u16 fid,
			const struct nls_table *nls_codepage)
{
	int rc = 0;
	int bytes_returned;
	int name_len;
	struct smb_com_transaction_ioctl_req * pSMB;
	struct smb_com_transaction_ioctl_rsp * pSMBr;

	cFYI(1, ("In Windows reparse style QueryLink for path %s", searchName));
	rc = smb_init(SMB_COM_NT_TRANSACT, 23, tcon, (void **) &pSMB,
		      (void **) &pSMBr);
	if (rc)
		return rc;

	pSMB->TotalParameterCount = 0 ;
	pSMB->TotalDataCount = 0;
	pSMB->MaxParameterCount = cpu_to_le32(2);
	/* BB find exact data count max from sess structure BB */
	pSMB->MaxDataCount = cpu_to_le32(4000);
	pSMB->MaxSetupCount = 4;
	pSMB->Reserved = 0;
	pSMB->ParameterOffset = 0;
	pSMB->DataCount = 0;
	pSMB->DataOffset = 0;
	pSMB->SetupCount = 4;
	pSMB->SubCommand = cpu_to_le16(NT_TRANSACT_IOCTL);
	pSMB->ParameterCount = pSMB->TotalParameterCount;
	pSMB->FunctionCode = cpu_to_le32(FSCTL_GET_REPARSE_POINT);
	pSMB->IsFsctl = 1; /* FSCTL */
	pSMB->IsRootFlag = 0;
	pSMB->Fid = fid; /* file handle always le */
	pSMB->ByteCount = 0;

	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
	if (rc) {
		cFYI(1, ("Send error in QueryReparseLinkInfo = %d", rc));
	} else {		/* decode response */
		__u32 data_offset = le32_to_cpu(pSMBr->DataOffset);
		__u32 data_count = le32_to_cpu(pSMBr->DataCount);
		if ((pSMBr->ByteCount < 2) || (data_offset > 512))
		/* BB also check enough total bytes returned */
			rc = -EIO;	/* bad smb */
		else {
			if(data_count && (data_count < 2048)) {
		/* could also validate reparse tag && better check name length */
				struct reparse_data * reparse_buf = (struct reparse_data *)
					((char *)&pSMBr->hdr.Protocol + data_offset);
				if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE) {
					name_len = UniStrnlen((wchar_t *)
							(reparse_buf->LinkNamesBuf + 
							reparse_buf->TargetNameOffset),
							min(buflen/2, reparse_buf->TargetNameLen / 2)); 
					cifs_strfromUCS_le(symlinkinfo,
						(wchar_t *) (reparse_buf->LinkNamesBuf + 
						reparse_buf->TargetNameOffset),
						name_len, nls_codepage);
				} else { /* ASCII names */
					strncpy(symlinkinfo,reparse_buf->LinkNamesBuf + 
						reparse_buf->TargetNameOffset, 
						min_t(const int, buflen, reparse_buf->TargetNameLen));
				}
			} else {
				rc = -EIO;
				cFYI(1,("Invalid return data count on get reparse info ioctl"));
			}
			symlinkinfo[buflen] = 0; /* just in case so the caller
					does not go off the end of the buffer */
			cFYI(1,("readlink result - %s ",symlinkinfo));
		}
	}
	if (pSMB)
		cifs_buf_release(pSMB);

	/* Note: On -EAGAIN error only caller can retry on handle based calls
		since file handle passed in no longer valid */

	return rc;
}

int
CIFSSMBQPathInfo(const int xid, struct cifsTconInfo *tcon,
		 const unsigned char *searchName,
		 FILE_ALL_INFO * pFindData,
		 const struct nls_table *nls_codepage)
{
/* level 263 SMB_QUERY_FILE_ALL_INFO */
	TRANSACTION2_QPI_REQ *pSMB = NULL;
	TRANSACTION2_QPI_RSP *pSMBr = NULL;
	int rc = 0;
	int bytes_returned;
	int name_len;
	__u16 params, byte_count;

	cFYI(1, ("In QPathInfo path %s", searchName));
QPathInfoRetry:
	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
		      (void **) &pSMBr);
	if (rc)
		return rc;

	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
		name_len =
		    cifs_strtoUCS((wchar_t *) pSMB->FileName, searchName, 530
				  /* find define for this maxpathcomponent */
				  , nls_codepage);
		name_len++;	/* trailing null */
		name_len *= 2;
	} else {		/* BB improve the check for buffer overruns BB */
		name_len = strnlen(searchName, 530);
		name_len++;	/* trailing null */
		strncpy(pSMB->FileName, searchName, name_len);
	}

	params = 2 /* level */ + 4 /* reserved */ + name_len /* includes NUL */ ;
	pSMB->TotalDataCount = 0;
	pSMB->MaxParameterCount = cpu_to_le16(2);
	pSMB->MaxDataCount = cpu_to_le16(4000);	/* BB find exact max SMB PDU from sess structure BB */
	pSMB->MaxSetupCount = 0;
	pSMB->Reserved = 0;
	pSMB->Flags = 0;
	pSMB->Timeout = 0;
	pSMB->Reserved2 = 0;
	pSMB->ParameterOffset = cpu_to_le16(offsetof(
        struct smb_com_transaction2_qpi_req ,InformationLevel) - 4);
	pSMB->DataCount = 0;
	pSMB->DataOffset = 0;
	pSMB->SetupCount = 1;
	pSMB->Reserved3 = 0;
	pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION);
	byte_count = params + 1 /* pad */ ;
	pSMB->TotalParameterCount = cpu_to_le16(params);
	pSMB->ParameterCount = pSMB->TotalParameterCount;
	pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FILE_ALL_INFO);
	pSMB->Reserved4 = 0;
	pSMB->hdr.smb_buf_length += byte_count;
	pSMB->ByteCount = cpu_to_le16(byte_count);

	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
	if (rc) {
		cFYI(1, ("Send error in QPathInfo = %d", rc));
	} else {		/* decode response */
		__u16 data_offset = le16_to_cpu(pSMBr->DataOffset);
		/* BB also check enough total bytes returned */
		/* BB we need to improve the validity checking
		of these trans2 responses */
		if ((pSMBr->ByteCount < 40) || (data_offset > 512)) 
			rc = -EIO;	/* bad smb */
		else if (pFindData){
			memcpy((char *) pFindData,
			       (char *) &pSMBr->hdr.Protocol +
			       data_offset, sizeof (FILE_ALL_INFO));
		} else
		    rc = -ENOMEM;
	}
	if (pSMB)
		cifs_buf_release(pSMB);
	if (rc == -EAGAIN)
		goto QPathInfoRetry;

	return rc;
}

int
CIFSSMBUnixQPathInfo(const int xid, struct cifsTconInfo *tcon,
		     const unsigned char *searchName,
		     FILE_UNIX_BASIC_INFO * pFindData,
		     const struct nls_table *nls_codepage)
{
/* SMB_QUERY_FILE_UNIX_BASIC */
	TRANSACTION2_QPI_REQ *pSMB = NULL;
	TRANSACTION2_QPI_RSP *pSMBr = NULL;
	int rc = 0;
	int bytes_returned = 0;
	int name_len;
	__u16 params, byte_count;

	cFYI(1, ("In QPathInfo (Unix) the path %s", searchName));
UnixQPathInfoRetry:
	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
		      (void **) &pSMBr);
	if (rc)
		return rc;

	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
		name_len =
		    cifs_strtoUCS((wchar_t *) pSMB->FileName, searchName, 530
				  /* find define for this maxpathcomponent */
				  , nls_codepage);
		name_len++;	/* trailing null */
		name_len *= 2;
	} else {		/* BB improve the check for buffer overruns BB */
		name_len = strnlen(searchName, 530);
		name_len++;	/* trailing null */
		strncpy(pSMB->FileName, searchName, name_len);
	}

	params = 2 /* level */ + 4 /* reserved */ + name_len /* includes NUL */ ;
	pSMB->TotalDataCount = 0;
	pSMB->MaxParameterCount = cpu_to_le16(2);
	/* BB find exact max SMB PDU from sess structure BB */
	pSMB->MaxDataCount = cpu_to_le16(4000); 
	pSMB->MaxSetupCount = 0;
	pSMB->Reserved = 0;
	pSMB->Flags = 0;
	pSMB->Timeout = 0;
	pSMB->Reserved2 = 0;
	pSMB->ParameterOffset = cpu_to_le16(offsetof(
        struct smb_com_transaction2_qpi_req ,InformationLevel) - 4);
	pSMB->DataCount = 0;
	pSMB->DataOffset = 0;
	pSMB->SetupCount = 1;
	pSMB->Reserved3 = 0;
	pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION);
	byte_count = params + 1 /* pad */ ;
	pSMB->TotalParameterCount = cpu_to_le16(params);
	pSMB->ParameterCount = pSMB->TotalParameterCount;
	pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FILE_UNIX_BASIC);
	pSMB->Reserved4 = 0;
	pSMB->hdr.smb_buf_length += byte_count;
	pSMB->ByteCount = cpu_to_le16(byte_count);

	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
	if (rc) {
		cFYI(1, ("Send error in QPathInfo = %d", rc));
	} else {		/* decode response */
		__u16 data_offset = le16_to_cpu(pSMBr->DataOffset);
		/* BB also check if enough total bytes returned */
		if ((pSMBr->ByteCount < sizeof(FILE_UNIX_BASIC_INFO)) || 
			(data_offset > 512) || 
			(data_offset < sizeof(struct smb_hdr))) {
			cFYI(1,("UnixQPathinfo invalid data offset %d bytes returned %d",
					(int)data_offset,bytes_returned));
			rc = -EIO;	/* bad smb */
		} else {
			memcpy((char *) pFindData,
			       (char *) &pSMBr->hdr.Protocol +
			       data_offset,
			       sizeof (FILE_UNIX_BASIC_INFO));
		}
	}
	if (pSMB)
		cifs_buf_release(pSMB);
	if (rc == -EAGAIN)
		goto UnixQPathInfoRetry;

	return rc;
}

int