[CIFS] Various minor bigendian fixes and sparse level 2 warning message fixes

Most important of these fixes mapchars on bigendian and a few statfs fields

Signed-off-by: Shaggy (shaggy@austin.ibm.com)
Signed-off-by: Steve French (sfrench@us.ibm.com)

fs/cifs/CHANGES

@@ -4,7 +4,8 @@ Fix readdir caching when unlink removes file in current search buffer,
 and this is followed by a rewind search to just before the deleted entry.
 Do not attempt to set ctime unless atime and/or mtime change requested
 (most servers throw it away anyway). Fix length check of received smbs
-to be more accurate.
+to be more accurate. Fix big endian problem with mapchars mount option,
+and with a field returned by statfs.
 
 Version 1.36
 ------------

fs/cifs/cifspdu.h

@@ -697,7 +697,7 @@ typedef struct smb_com_openx_req {
 	__le32 EndOfFile;
 	__le32 Timeout;
 	__le32 Reserved;
-	__u16  ByteCount;  /* file name follows */
+	__le16  ByteCount;  /* file name follows */
 	char   fileName[1];
 } OPENX_REQ;
 

fs/cifs/cifsproto.h

@@ -56,6 +56,7 @@ extern int checkSMB(struct smb_hdr *smb, __u16 mid, int length);
 extern int is_valid_oplock_break(struct smb_hdr *smb);
 extern int is_size_safe_to_change(struct cifsInodeInfo *);
 extern unsigned int smbCalcSize(struct smb_hdr *ptr);
+extern unsigned int smbCalcSize_LE(struct smb_hdr *ptr);
 extern int decode_negTokenInit(unsigned char *security_blob, int length,
 			enum securityEnum *secType);
 extern int cifs_inet_pton(int, char * source, void *dst);

fs/cifs/cifssmb.c

@@ -779,7 +779,7 @@ SMBLegacyOpen(const int xid, struct cifsTconInfo *tcon,
 	/* BB FIXME END BB */
 
 	pSMB->Sattr = cpu_to_le16(ATTR_HIDDEN | ATTR_SYSTEM | ATTR_DIRECTORY);
-	pSMB->OpenFunction = convert_disposition(openDisposition);
+	pSMB->OpenFunction = cpu_to_le16(convert_disposition(openDisposition));
 	count += name_len;
 	pSMB->hdr.smb_buf_length += count;
 
@@ -808,10 +808,12 @@ SMBLegacyOpen(const int xid, struct cifsTconInfo *tcon,
 			pfile_info->LastAccessTime = 0; /* BB fixme */
 			pfile_info->LastWriteTime = 0; /* BB fixme */
 			pfile_info->ChangeTime = 0;  /* BB fixme */
-			pfile_info->Attributes = pSMBr->FileAttributes; 
+			pfile_info->Attributes =
+				cpu_to_le32(le16_to_cpu(pSMBr->FileAttributes)); 
 			/* the file_info buf is endian converted by caller */
-			pfile_info->AllocationSize = pSMBr->EndOfFile;
-			pfile_info->EndOfFile = pSMBr->EndOfFile;
+			pfile_info->AllocationSize =
+				cpu_to_le64(le32_to_cpu(pSMBr->EndOfFile));
+			pfile_info->EndOfFile = pfile_info->AllocationSize;
 			pfile_info->NumberOfLinks = cpu_to_le32(1);
 		}
 	}
@@ -2390,9 +2392,11 @@ int SMBQueryInformation(const int xid, struct cifsTconInfo *tcon,
 		cFYI(1, ("Send error in QueryInfo = %d", rc));
 	} else if (pFinfo) {            /* decode response */
 		memset(pFinfo, 0, sizeof(FILE_ALL_INFO));
-		pFinfo->AllocationSize = (__le64) pSMBr->size;
-		pFinfo->EndOfFile = (__le64) pSMBr->size;
-		pFinfo->Attributes = (__le32) pSMBr->attr;
+		pFinfo->AllocationSize =
+			cpu_to_le64(le32_to_cpu(pSMBr->size));
+		pFinfo->EndOfFile = pFinfo->AllocationSize;
+		pFinfo->Attributes =
+			cpu_to_le32(le16_to_cpu(pSMBr->attr));
 	} else
 		rc = -EIO; /* bad buffer passed in */
 
@@ -3722,16 +3726,16 @@ CIFSSMBQFSPosixInfo(const int xid, struct cifsTconInfo *tcon,
 					le64_to_cpu(response_data->TotalBlocks);
 			FSData->f_bfree =
 			    le64_to_cpu(response_data->BlocksAvail);
-			if(response_data->UserBlocksAvail == -1) {
+			if(response_data->UserBlocksAvail == cpu_to_le64(-1)) {
 				FSData->f_bavail = FSData->f_bfree;
 			} else {
 				FSData->f_bavail =
 					le64_to_cpu(response_data->UserBlocksAvail);
 			}
-			if(response_data->TotalFileNodes != -1)
+			if(response_data->TotalFileNodes != cpu_to_le64(-1))
 				FSData->f_files =
 					le64_to_cpu(response_data->TotalFileNodes);
-			if(response_data->FreeFileNodes != -1)
+			if(response_data->FreeFileNodes != cpu_to_le64(-1))
 				FSData->f_ffree =
 					le64_to_cpu(response_data->FreeFileNodes);
 		}

fs/cifs/connect.c

@@ -303,12 +303,12 @@ static int coalesce_t2(struct smb_hdr * psecond, struct smb_hdr *pTargetSMB)
 	byte_count += total_in_buf2;
 	BCC_LE(pTargetSMB) = cpu_to_le16(byte_count);
 
-	byte_count = be32_to_cpu(pTargetSMB->smb_buf_length);
+	byte_count = pTargetSMB->smb_buf_length;
 	byte_count += total_in_buf2;
 
 	/* BB also add check that we are not beyond maximum buffer size */
 		
-	pTargetSMB->smb_buf_length = cpu_to_be32(byte_count);
+	pTargetSMB->smb_buf_length = byte_count;
 
 	if(remaining == total_in_buf2) {
 		cFYI(1,("found the last secondary response"));
@@ -333,7 +333,7 @@ cifs_demultiplex_thread(struct TCP_Server_Info *server)
 	struct cifsSesInfo *ses;
 	struct task_struct *task_to_wake = NULL;
 	struct mid_q_entry *mid_entry;
-	char *temp;
+	char temp;
 	int isLargeBuf = FALSE;
 	int isMultiRsp;
 	int reconnect;
@@ -435,22 +435,32 @@ cifs_demultiplex_thread(struct TCP_Server_Info *server)
 			continue;
 		}
 
-		/* the right amount was read from socket - 4 bytes */
+		/* The right amount was read from socket - 4 bytes */
+		/* so we can now interpret the length field */
 
+		/* the first byte big endian of the length field,
+		is actually not part of the length but the type
+		with the most common, zero, as regular data */
+		temp = *((char *) smb_buffer);
+
+		/* Note that FC 1001 length is big endian on the wire, 
+		but we convert it here so it is always manipulated
+		as host byte order */
 		pdu_length = ntohl(smb_buffer->smb_buf_length);
-		cFYI(1,("rfc1002 length(big endian)0x%x)", pdu_length+4));
+		smb_buffer->smb_buf_length = pdu_length;
+
+		cFYI(1,("rfc1002 length 0x%x)", pdu_length+4));
 
-		temp = (char *) smb_buffer;
-		if (temp[0] == (char) RFC1002_SESSION_KEEP_ALIVE) {
+		if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
 			continue; 
-		} else if (temp[0] == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
+		} else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
 			cFYI(1,("Good RFC 1002 session rsp"));
 			continue;
-		} else if (temp[0] == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
+		} else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
 			/* we get this from Windows 98 instead of 
 			   an error on SMB negprot response */
 			cFYI(1,("Negative RFC1002 Session Response Error 0x%x)",
-				temp[4]));
+				pdu_length));
 			if(server->tcpStatus == CifsNew) {
 				/* if nack on negprot (rather than 
 				ret of smb negprot error) reconnecting
@@ -472,9 +482,10 @@ cifs_demultiplex_thread(struct TCP_Server_Info *server)
 				wake_up(&server->response_q);
 				continue;
 			}
-		} else if (temp[0] != (char) 0) {
+		} else if (temp != (char) 0) {
 			cERROR(1,("Unknown RFC 1002 frame"));
-			cifs_dump_mem(" Received Data: ", temp, length);
+			cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
+				      length);
 			cifs_reconnect(server);
 			csocket = server->ssocket;
 			continue;
@@ -609,7 +620,8 @@ cifs_demultiplex_thread(struct TCP_Server_Info *server)
 		} else if ((is_valid_oplock_break(smb_buffer) == FALSE)
 		    && (isMultiRsp == FALSE)) {                          
 			cERROR(1, ("No task to wake, unknown frame rcvd!"));
-			cifs_dump_mem("Received Data is: ",temp,sizeof(struct smb_hdr));
+			cifs_dump_mem("Received Data is: ",(char *)smb_buffer,
+				      sizeof(struct smb_hdr));
 		}
 	} /* end while !EXITING */
 

fs/cifs/misc.c

@@ -419,7 +419,7 @@ checkSMBhdr(struct smb_hdr *smb, __u16 mid)
 int
 checkSMB(struct smb_hdr *smb, __u16 mid, int length)
 {
-	__u32 len = be32_to_cpu(smb->smb_buf_length);
+	__u32 len = smb->smb_buf_length;
 	cFYI(0,
 	     ("Entering checkSMB with Length: %x, smb_buf_length: %x ",
 	      length, len));
@@ -448,9 +448,9 @@ checkSMB(struct smb_hdr *smb, __u16 mid, int length)
 	if (checkSMBhdr(smb, mid))
 		return 1;
 
-	if ((4 + len != smbCalcSize(smb))
+	if ((4 + len != smbCalcSize_LE(smb))
 	    || (4 + len != (unsigned int)length)) {
-		cERROR(1, ("smbCalcSize %x ", smbCalcSize(smb)));
+		cERROR(1, ("smbCalcSize %x ", smbCalcSize_LE(smb)));
 		cERROR(1,
 		       ("bad smb size detected. The Mid=%d", smb->Mid));
 		return 1;
@@ -672,6 +672,7 @@ cifsConvertToUCS(__le16 * target, const char *source, int maxlen,
 	int i,j,charlen;
 	int len_remaining = maxlen;
 	char src_char;
+	__u16 temp;
 
 	if(!mapChars) 
 		return cifs_strtoUCS((wchar_t *) target, source, PATH_MAX, cp);
@@ -708,13 +709,14 @@ cifsConvertToUCS(__le16 * target, const char *source, int maxlen,
 				break;*/
 			default:
 				charlen = cp->char2uni(source+i,
-					len_remaining, target+j);
+					len_remaining, &temp);
 				/* if no match, use question mark, which
 				at least in some cases servers as wild card */
 				if(charlen < 1) {
 					target[j] = cpu_to_le16(0x003f);
 					charlen = 1;
-				}
+				} else
+					target[j] = cpu_to_le16(temp);
 				len_remaining -= charlen;
 				/* character may take more than one byte in the
 				   the source string, but will take exactly two

fs/cifs/netmisc.c

@@ -868,7 +868,14 @@ unsigned int
 smbCalcSize(struct smb_hdr *ptr)
 {
 	return (sizeof (struct smb_hdr) + (2 * ptr->WordCount) +
-		2 /* size of the bcc field itself */ + BCC(ptr));
+		2 /* size of the bcc field */ + BCC(ptr));
+}
+
+unsigned int
+smbCalcSize_LE(struct smb_hdr *ptr)
+{
+	return (sizeof (struct smb_hdr) + (2 * ptr->WordCount) +
+		2 /* size of the bcc field */ + le16_to_cpu(BCC_LE(ptr)));
 }
 
 /* The following are taken from fs/ntfs/util.c */

fs/cifs/transport.c

@@ -414,7 +414,7 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
 	spin_lock(&GlobalMid_Lock);
 	if (midQ->resp_buf) {
 		spin_unlock(&GlobalMid_Lock);
-		receive_len = be32_to_cpu(*(__be32 *)midQ->resp_buf);
+		receive_len = midQ->resp_buf->smb_buf_length;
 	} else {
 		cERROR(1,("No response buffer"));
 		if(midQ->midState == MID_REQUEST_SUBMITTED) {
@@ -665,7 +665,7 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
 	spin_lock(&GlobalMid_Lock);
 	if (midQ->resp_buf) {
 		spin_unlock(&GlobalMid_Lock);
-		receive_len = be32_to_cpu(*(__be32 *)midQ->resp_buf);
+		receive_len = midQ->resp_buf->smb_buf_length;
 	} else {
 		cERROR(1,("No response buffer"));
 		if(midQ->midState == MID_REQUEST_SUBMITTED) {