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Commit e89dc920 authored by Steve French's avatar Steve French
Browse files

[CIFS] Cleanup sparse warnings for unicode little endian casts 



Following Shaggy's suggestion, do a better job on the unicode string
handling routines in cifs in specifying that the wchar_t are really
little endian widechars (__le16).

Signed-off-by: default avatarSteve French <sfrench@us.ibm.com>
parent 8b94bcb9

fs/cifs/cifs_unicode.c

+7 −6
Original line number Diff line number Diff line 
/*

 *   fs/cifs/cifs_unicode.c

 *

 *   Copyright (c) International Business Machines  Corp., 2000,2002

 *   Copyright (c) International Business Machines  Corp., 2000,2005

 *   Modified by Steve French (sfrench@us.ibm.com)

 *

 *   This program is free software;  you can redistribute it and/or modify
@@ -31,7 +31,7 @@ 
 *

 */

int

cifs_strfromUCS_le(char *to, const wchar_t * from,	/* LITTLE ENDIAN */

cifs_strfromUCS_le(char *to, const __le16 * from,	

		   int len, const struct nls_table *codepage)

{

	int i;
@@ -60,25 +60,26 @@ cifs_strfromUCS_le(char *to, const wchar_t * from, /* LITTLE ENDIAN */ 
 *

 */

int

cifs_strtoUCS(wchar_t * to, const char *from, int len,

cifs_strtoUCS(__le16 * to, const char *from, int len,

	      const struct nls_table *codepage)

{

	int charlen;

	int i;

	wchar_t * wchar_to = (wchar_t *)to; /* needed to quiet sparse */  



	for (i = 0; len && *from; i++, from += charlen, len -= charlen) {



		/* works for 2.4.0 kernel or later */

		charlen = codepage->char2uni(from, len, &to[i]);

		charlen = codepage->char2uni(from, len, &wchar_to[i]);

		if (charlen < 1) {

			cERROR(1,

			       ("cifs_strtoUCS: char2uni returned %d",

				charlen));

			/* A question mark */

			to[i] = (wchar_t)cpu_to_le16(0x003f);

			to[i] = cpu_to_le16(0x003f);

			charlen = 1;

		} else 

			to[i] = (wchar_t)cpu_to_le16(to[i]);

			to[i] = cpu_to_le16(wchar_to[i]);



	}

fs/cifs/cifs_unicode.h

+3 −3
Original line number Diff line number Diff line
@@ -5,7 +5,7 @@ 
 *     Convert a unicode character to upper or lower case using

 *     compressed tables.

 *

 *   Copyright (c) International Business Machines  Corp., 2000,2002

 *   Copyright (c) International Business Machines  Corp., 2000,2005555555555555555555555555555555555555555555555555555555

 *

 *   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
@@ -59,8 +59,8 @@ extern struct UniCaseRange UniLowerRange[]; 
#endif				/* UNIUPR_NOLOWER */



#ifdef __KERNEL__

int cifs_strfromUCS_le(char *, const wchar_t *, int, const struct nls_table *);

int cifs_strtoUCS(wchar_t *, const char *, int, const struct nls_table *);

int cifs_strfromUCS_le(char *, const __le16 *, int, const struct nls_table *);

int cifs_strtoUCS(__le16 *, const char *, int, const struct nls_table *);

#endif



/*

fs/cifs/cifsencrypt.c

+1 −1
Original line number Diff line number Diff line
@@ -149,7 +149,7 @@ int CalcNTLMv2_partial_mac_key(struct cifsSesInfo * ses, struct nls_table * nls_ 
	char temp_hash[16];

	struct HMACMD5Context ctx;

	char * ucase_buf;

	wchar_t * unicode_buf;

	__le16 * unicode_buf;

	unsigned int i,user_name_len,dom_name_len;



	if(ses == NULL)

fs/cifs/cifssmb.c

+6 −6
Original line number Diff line number Diff line
@@ -1553,7 +1553,7 @@ CIFSUnixCreateSymLink(const int xid, struct cifsTconInfo *tcon, 


	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {

		name_len =

		    cifs_strtoUCS((wchar_t *) pSMB->FileName, fromName, PATH_MAX

		    cifs_strtoUCS((__le16 *) pSMB->FileName, fromName, PATH_MAX

				  /* find define for this maxpathcomponent */

				  , nls_codepage);

		name_len++;	/* trailing null */
@@ -1577,7 +1577,7 @@ CIFSUnixCreateSymLink(const int xid, struct cifsTconInfo *tcon, 
	data_offset = (char *) (&pSMB->hdr.Protocol) + offset;

	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {

		name_len_target =

		    cifs_strtoUCS((wchar_t *) data_offset, toName, PATH_MAX

		    cifs_strtoUCS((__le16 *) data_offset, toName, PATH_MAX

				  /* find define for this maxpathcomponent */

				  , nls_codepage);

		name_len_target++;	/* trailing null */
@@ -1803,7 +1803,7 @@ CIFSSMBUnixQuerySymLink(const int xid, struct cifsTconInfo *tcon, 


	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {

		name_len =

		    cifs_strtoUCS((wchar_t *) pSMB->FileName, searchName, PATH_MAX

		    cifs_strtoUCS((__le16 *) pSMB->FileName, searchName, PATH_MAX

				  /* find define for this maxpathcomponent */

				  , nls_codepage);

		name_len++;	/* trailing null */
@@ -1860,7 +1860,7 @@ CIFSSMBUnixQuerySymLink(const int xid, struct cifsTconInfo *tcon, 
					min_t(const int, buflen,count) / 2);

			/* BB FIXME investigate remapping reserved chars here */

				cifs_strfromUCS_le(symlinkinfo,

					(wchar_t *) ((char *)&pSMBr->hdr.Protocol +

					(__le16 *) ((char *)&pSMBr->hdr.Protocol +

						data_offset),

					name_len, nls_codepage);

			} else {
@@ -1951,7 +1951,7 @@ CIFSSMBQueryReparseLinkInfo(const int xid, struct cifsTconInfo *tcon, 
							reparse_buf->TargetNameOffset),

							min(buflen/2, reparse_buf->TargetNameLen / 2)); 

					cifs_strfromUCS_le(symlinkinfo,

						(wchar_t *) (reparse_buf->LinkNamesBuf + 

						(__le16 *) (reparse_buf->LinkNamesBuf + 

						reparse_buf->TargetNameOffset),

						name_len, nls_codepage);

				} else { /* ASCII names */
@@ -3203,7 +3203,7 @@ CIFSGetDFSRefer(const int xid, struct cifsSesInfo *ses, 
				temp = ((char *)referrals) + le16_to_cpu(referrals->DfsPathOffset);

				if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE) {

					cifs_strfromUCS_le(*targetUNCs,

						(wchar_t *) temp, name_len, nls_codepage);

						(__le16 *) temp, name_len, nls_codepage);

				} else {

					strncpy(*targetUNCs,temp,name_len);

				}

fs/cifs/connect.c

+41 −50
Original line number Diff line number Diff line
@@ -1986,32 +1986,32 @@ CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses, 
			bytes_returned = 0; /* skill null user */

	        else

			bytes_returned =

			        cifs_strtoUCS((wchar_t *) bcc_ptr, user, 100,

			        cifs_strtoUCS((__le16 *) bcc_ptr, user, 100,

					nls_codepage);

		/* convert number of 16 bit words to bytes */

		bcc_ptr += 2 * bytes_returned;

		bcc_ptr += 2;	/* trailing null */

		if (domain == NULL)

			bytes_returned =

			    cifs_strtoUCS((wchar_t *) bcc_ptr,

			    cifs_strtoUCS((__le16 *) bcc_ptr,

					  "CIFS_LINUX_DOM", 32, nls_codepage);

		else

			bytes_returned =

			    cifs_strtoUCS((wchar_t *) bcc_ptr, domain, 64,

			    cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,

					  nls_codepage);

		bcc_ptr += 2 * bytes_returned;

		bcc_ptr += 2;

		bytes_returned =

		    cifs_strtoUCS((wchar_t *) bcc_ptr, "Linux version ",

		    cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",

				  32, nls_codepage);

		bcc_ptr += 2 * bytes_returned;

		bytes_returned =

		    cifs_strtoUCS((wchar_t *) bcc_ptr, system_utsname.release,

		    cifs_strtoUCS((__le16 *) bcc_ptr, system_utsname.release,

				  32, nls_codepage);

		bcc_ptr += 2 * bytes_returned;

		bcc_ptr += 2;

		bytes_returned =

		    cifs_strtoUCS((wchar_t *) bcc_ptr, CIFS_NETWORK_OPSYS,

		    cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,

				  64, nls_codepage);

		bcc_ptr += 2 * bytes_returned;

		bcc_ptr += 2;
@@ -2081,7 +2081,7 @@ CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses, 
				if(ses->serverOS == NULL)

					goto sesssetup_nomem;

				cifs_strfromUCS_le(ses->serverOS,

					   (wchar_t *)bcc_ptr, len,nls_codepage);

					   (__le16 *)bcc_ptr, len,nls_codepage);

				bcc_ptr += 2 * (len + 1);

				remaining_words -= len + 1;

				ses->serverOS[2 * len] = 0;
@@ -2093,7 +2093,7 @@ CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses, 
					if(ses->serverNOS == NULL)

						goto sesssetup_nomem;

					cifs_strfromUCS_le(ses->serverNOS,

							   (wchar_t *)bcc_ptr,len,nls_codepage);

							   (__le16 *)bcc_ptr,len,nls_codepage);

					bcc_ptr += 2 * (len + 1);

					ses->serverNOS[2 * len] = 0;

					ses->serverNOS[1 + (2 * len)] = 0;
@@ -2111,7 +2111,7 @@ CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses, 
						if(ses->serverDomain == NULL)

							goto sesssetup_nomem;

						cifs_strfromUCS_le(ses->serverDomain,

						     (wchar_t *)bcc_ptr,len,nls_codepage);

						     (__le16 *)bcc_ptr,len,nls_codepage);

						bcc_ptr += 2 * (len + 1);

						ses->serverDomain[2*len] = 0;

						ses->serverDomain[1+(2*len)] = 0;
@@ -2255,30 +2255,30 @@ CIFSSpnegoSessSetup(unsigned int xid, struct cifsSesInfo *ses, 
			bcc_ptr++;

		}

		bytes_returned =

		    cifs_strtoUCS((wchar_t *) bcc_ptr, user, 100, nls_codepage);

		    cifs_strtoUCS((__le16 *) bcc_ptr, user, 100, nls_codepage);

		bcc_ptr += 2 * bytes_returned;	/* convert num of 16 bit words to bytes */

		bcc_ptr += 2;	/* trailing null */

		if (domain == NULL)

			bytes_returned =

			    cifs_strtoUCS((wchar_t *) bcc_ptr,

			    cifs_strtoUCS((__le16 *) bcc_ptr,

					  "CIFS_LINUX_DOM", 32, nls_codepage);

		else

			bytes_returned =

			    cifs_strtoUCS((wchar_t *) bcc_ptr, domain, 64,

			    cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,

					  nls_codepage);

		bcc_ptr += 2 * bytes_returned;

		bcc_ptr += 2;

		bytes_returned =

		    cifs_strtoUCS((wchar_t *) bcc_ptr, "Linux version ",

		    cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",

				  32, nls_codepage);

		bcc_ptr += 2 * bytes_returned;

		bytes_returned =

		    cifs_strtoUCS((wchar_t *) bcc_ptr, system_utsname.release, 32,

		    cifs_strtoUCS((__le16 *) bcc_ptr, system_utsname.release, 32,

				  nls_codepage);

		bcc_ptr += 2 * bytes_returned;

		bcc_ptr += 2;

		bytes_returned =

		    cifs_strtoUCS((wchar_t *) bcc_ptr, CIFS_NETWORK_OPSYS,

		    cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,

				  64, nls_codepage);

		bcc_ptr += 2 * bytes_returned;

		bcc_ptr += 2;
@@ -2357,7 +2357,7 @@ CIFSSpnegoSessSetup(unsigned int xid, struct cifsSesInfo *ses, 
					ses->serverOS =

					    kzalloc(2 * (len + 1), GFP_KERNEL);

					cifs_strfromUCS_le(ses->serverOS,

							   (wchar_t *)

							   (__le16 *)

							   bcc_ptr, len,

							   nls_codepage);

					bcc_ptr += 2 * (len + 1);
@@ -2372,7 +2372,7 @@ CIFSSpnegoSessSetup(unsigned int xid, struct cifsSesInfo *ses, 
						    kzalloc(2 * (len + 1),

							    GFP_KERNEL);

						cifs_strfromUCS_le(ses->serverNOS,

								   (wchar_t *)bcc_ptr,

								   (__le16 *)bcc_ptr,

								   len,

								   nls_codepage);

						bcc_ptr += 2 * (len + 1);
@@ -2384,9 +2384,8 @@ CIFSSpnegoSessSetup(unsigned int xid, struct cifsSesInfo *ses, 
                            /* last string is not always null terminated (for e.g. for Windows XP & 2000) */

							ses->serverDomain = kzalloc(2*(len+1),GFP_KERNEL);

							cifs_strfromUCS_le(ses->serverDomain,

							     (wchar_t *)bcc_ptr, 

                                 len,

							     nls_codepage);

							     (__le16 *)bcc_ptr, 

							     len, nls_codepage);

							bcc_ptr += 2*(len+1);

							ses->serverDomain[2*len] = 0;

							ses->serverDomain[1+(2*len)] = 0;
@@ -2560,16 +2559,16 @@ CIFSNTLMSSPNegotiateSessSetup(unsigned int xid, 
		}



		bytes_returned =

		    cifs_strtoUCS((wchar_t *) bcc_ptr, "Linux version ",

		    cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",

				  32, nls_codepage);

		bcc_ptr += 2 * bytes_returned;

		bytes_returned =

		    cifs_strtoUCS((wchar_t *) bcc_ptr, system_utsname.release, 32,

		    cifs_strtoUCS((__le16 *) bcc_ptr, system_utsname.release, 32,

				  nls_codepage);

		bcc_ptr += 2 * bytes_returned;

		bcc_ptr += 2;	/* null terminate Linux version */

		bytes_returned =

		    cifs_strtoUCS((wchar_t *) bcc_ptr, CIFS_NETWORK_OPSYS,

		    cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,

				  64, nls_codepage);

		bcc_ptr += 2 * bytes_returned;

		*(bcc_ptr + 1) = 0;
@@ -2673,7 +2672,7 @@ CIFSNTLMSSPNegotiateSessSetup(unsigned int xid, 
					ses->serverOS =

					    kzalloc(2 * (len + 1), GFP_KERNEL);

					cifs_strfromUCS_le(ses->serverOS,

							   (wchar_t *)

							   (__le16 *)

							   bcc_ptr, len,

							   nls_codepage);

					bcc_ptr += 2 * (len + 1);
@@ -2690,7 +2689,7 @@ CIFSNTLMSSPNegotiateSessSetup(unsigned int xid, 
							    GFP_KERNEL);

						cifs_strfromUCS_le(ses->

								   serverNOS,

								   (wchar_t *)

								   (__le16 *)

								   bcc_ptr,

								   len,

								   nls_codepage);
@@ -2708,23 +2707,15 @@ CIFSNTLMSSPNegotiateSessSetup(unsigned int xid, 
								     1),

								    GFP_KERNEL);

							cifs_strfromUCS_le

							    (ses->

							     serverDomain,

							     (wchar_t *)

							     bcc_ptr, len,

							     nls_codepage);

							    (ses->serverDomain,

							     (__le16 *)bcc_ptr,

							     len, nls_codepage);

							bcc_ptr +=

							    2 * (len + 1);

							ses->

							    serverDomain[2

									 * len]

							ses->serverDomain[2*len]

							    = 0;

							ses->

							    serverDomain[1

									 +

									 (2

									  *

									  len)]

							ses->serverDomain

								[1 + (2 * len)]

							    = 0;

						} /* else no more room so create dummy domain string */

						else
@@ -2903,7 +2894,7 @@ CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses, 
			SecurityBlob->DomainName.MaximumLength = 0;

		} else {

			__u16 len =

			    cifs_strtoUCS((wchar_t *) bcc_ptr, domain, 64,

			    cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,

					  nls_codepage);

			len *= 2;

			SecurityBlob->DomainName.MaximumLength =
@@ -2921,7 +2912,7 @@ CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses, 
			SecurityBlob->UserName.MaximumLength = 0;

		} else {

			__u16 len =

			    cifs_strtoUCS((wchar_t *) bcc_ptr, user, 64,

			    cifs_strtoUCS((__le16 *) bcc_ptr, user, 64,

					  nls_codepage);

			len *= 2;

			SecurityBlob->UserName.MaximumLength =
@@ -2934,7 +2925,7 @@ CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses, 
			    cpu_to_le16(len);

		}



		/* SecurityBlob->WorkstationName.Length = cifs_strtoUCS((wchar_t *) bcc_ptr, "AMACHINE",64, nls_codepage);

		/* SecurityBlob->WorkstationName.Length = cifs_strtoUCS((__le16 *) bcc_ptr, "AMACHINE",64, nls_codepage);

		   SecurityBlob->WorkstationName.Length *= 2;

		   SecurityBlob->WorkstationName.MaximumLength = cpu_to_le16(SecurityBlob->WorkstationName.Length);

		   SecurityBlob->WorkstationName.Buffer = cpu_to_le32(SecurityBlobLength);
@@ -2947,16 +2938,16 @@ CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses, 
			bcc_ptr++;

		}

		bytes_returned =

		    cifs_strtoUCS((wchar_t *) bcc_ptr, "Linux version ",

		    cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",

				  32, nls_codepage);

		bcc_ptr += 2 * bytes_returned;

		bytes_returned =

		    cifs_strtoUCS((wchar_t *) bcc_ptr, system_utsname.release, 32,

		    cifs_strtoUCS((__le16 *) bcc_ptr, system_utsname.release, 32,

				  nls_codepage);

		bcc_ptr += 2 * bytes_returned;

		bcc_ptr += 2;	/* null term version string */

		bytes_returned =

		    cifs_strtoUCS((wchar_t *) bcc_ptr, CIFS_NETWORK_OPSYS,

		    cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,

				  64, nls_codepage);

		bcc_ptr += 2 * bytes_returned;

		*(bcc_ptr + 1) = 0;
@@ -3069,7 +3060,7 @@ CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses, 
					ses->serverOS =

					    kzalloc(2 * (len + 1), GFP_KERNEL);

					cifs_strfromUCS_le(ses->serverOS,

							   (wchar_t *)

							   (__le16 *)

							   bcc_ptr, len,

							   nls_codepage);

					bcc_ptr += 2 * (len + 1);
@@ -3086,7 +3077,7 @@ CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses, 
							    GFP_KERNEL);

						cifs_strfromUCS_le(ses->

								   serverNOS,

								   (wchar_t *)

								   (__le16 *)

								   bcc_ptr,

								   len,

								   nls_codepage);
@@ -3105,7 +3096,7 @@ CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses, 
							cifs_strfromUCS_le

							    (ses->

							     serverDomain,

							     (wchar_t *)

							     (__le16 *)

							     bcc_ptr, len,

							     nls_codepage);

							bcc_ptr +=
@@ -3227,7 +3218,7 @@ CIFSTCon(unsigned int xid, struct cifsSesInfo *ses, 
	if (ses->capabilities & CAP_UNICODE) {

		smb_buffer->Flags2 |= SMBFLG2_UNICODE;

		length =

		    cifs_strtoUCS((wchar_t *) bcc_ptr, tree, 100, nls_codepage);

		    cifs_strtoUCS((__le16 *) bcc_ptr, tree, 100, nls_codepage);

		bcc_ptr += 2 * length;	/* convert num of 16 bit words to bytes */

		bcc_ptr += 2;	/* skip trailing null */

	} else {		/* ASCII */
@@ -3263,7 +3254,7 @@ CIFSTCon(unsigned int xid, struct cifsSesInfo *ses, 
				tcon->nativeFileSystem =

				    kzalloc(length + 2, GFP_KERNEL);

				cifs_strfromUCS_le(tcon->nativeFileSystem,

						   (wchar_t *) bcc_ptr,

						   (__le16 *) bcc_ptr,

						   length, nls_codepage);

				bcc_ptr += 2 * length;

				bcc_ptr[0] = 0;	/* null terminate the string */