cifssmb.c

Linux Kernel 2.6.9 for OMAP1710

/* do not retry on dead session on close */
	rc = smb_init(SMB_COM_CLOSE, 3, tcon, (void **) &pSMB,
		      (void **) &pSMBr);
	if(rc == -EAGAIN)
		return 0;
	if (rc)
		return rc;

	pSMB->FileID = (__u16) smb_file_id;
	pSMB->LastWriteTime = 0;
	pSMB->ByteCount = 0;
	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
	if (rc) {
		if(rc!=-EINTR) {
			/* EINTR is expected when user ctl-c to kill app */
			cERROR(1, ("Send error in Close = %d", rc));
		}
	}
	if (pSMB)
		cifs_buf_release(pSMB);

	/* Since session is dead, file will be closed on server already */
	if(rc == -EAGAIN)
		rc = 0;

	return rc;
}

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

	cFYI(1, ("In CIFSSMBRename"));
renameRetry:
	rc = smb_init(SMB_COM_RENAME, 1, tcon, (void **) &pSMB,
		      (void **) &pSMBr);
	if (rc)
		return rc;

	pSMB->BufferFormat = 0x04;
	pSMB->SearchAttributes =
	    cpu_to_le16(ATTR_READONLY | ATTR_HIDDEN | ATTR_SYSTEM |
			ATTR_DIRECTORY);

	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] = 0x04;	/* pad */
	/* protocol requires ASCII signature byte on Unicode string */
		pSMB->OldFileName[name_len + 1] = 0x00;
		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 /* 1st signature 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 rename = %d", rc));
	} 

#ifdef CONFIG_CIFS_STATS
	  else {
		atomic_inc(&tcon->num_renames);
	}
#endif

	if (pSMB)
		cifs_buf_release(pSMB);

	if (rc == -EAGAIN)
		goto renameRetry;

	return rc;
}

int CIFSSMBRenameOpenFile(const int xid,struct cifsTconInfo *pTcon, 
		int netfid, char * target_name, const struct nls_table * nls_codepage) 
{
	struct smb_com_transaction2_sfi_req *pSMB  = NULL;
	struct smb_com_transaction2_sfi_rsp *pSMBr = NULL;
	struct set_file_rename * rename_info;
	char *data_offset;
	char dummy_string[30];
	int rc = 0;
	int bytes_returned = 0;
	int len_of_str;
	__u16 params, param_offset, offset, count, byte_count;

	cFYI(1, ("Rename to File by handle"));
	rc = smb_init(SMB_COM_TRANSACTION2, 15, pTcon, (void **) &pSMB,
			(void **) &pSMBr);
	if (rc)
		return rc;

	params = 6;
	pSMB->MaxSetupCount = 0;
	pSMB->Reserved = 0;
	pSMB->Flags = 0;
	pSMB->Timeout = 0;
	pSMB->Reserved2 = 0;
	param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4;
	offset = param_offset + params;

	data_offset = (char *) (&pSMB->hdr.Protocol) + offset;
	rename_info = (struct set_file_rename *) data_offset;
	pSMB->MaxParameterCount = cpu_to_le16(2);
	pSMB->MaxDataCount = cpu_to_le16(1000); /* BB find max SMB PDU from sess */
	pSMB->SetupCount = 1;
	pSMB->Reserved3 = 0;
	pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FILE_INFORMATION);
	byte_count = 3 /* pad */  + params;
	pSMB->ParameterCount = cpu_to_le16(params);
	pSMB->TotalParameterCount = pSMB->ParameterCount;
	pSMB->ParameterOffset = cpu_to_le16(param_offset);
	pSMB->DataOffset = cpu_to_le16(offset);
	/* construct random name ".cifs_tmp<inodenum><mid>" */
	rename_info->overwrite = cpu_to_le32(1);
	rename_info->root_fid  = 0;
	/* unicode only call */
	if(target_name == NULL) {
		sprintf(dummy_string,"cifs%x",pSMB->hdr.Mid);
	        len_of_str = cifs_strtoUCS((wchar_t *) rename_info->target_name, dummy_string, 24, nls_codepage);
	} else {
		len_of_str = cifs_strtoUCS((wchar_t *) rename_info->target_name, target_name, 530, nls_codepage);
	}
	rename_info->target_name_len = cpu_to_le32(2 * len_of_str);
	count = 12 /* sizeof(struct set_file_rename) */ + (2 * len_of_str) + 2;
	byte_count += count;
	pSMB->DataCount = cpu_to_le16(count);
	pSMB->TotalDataCount = pSMB->DataCount;
	pSMB->Fid = netfid;
	pSMB->InformationLevel =
		cpu_to_le16(SMB_SET_FILE_RENAME_INFORMATION);
	pSMB->Reserved4 = 0;
	pSMB->hdr.smb_buf_length += byte_count;
	pSMB->ByteCount = cpu_to_le16(byte_count);
	rc = SendReceive(xid, pTcon->ses, (struct smb_hdr *) pSMB,
                         (struct smb_hdr *) pSMBr, &bytes_returned, 0);
	if (rc) {
		cFYI(1,("Send error in Rename (by file handle) = %d", rc));
	}
#ifdef CONFIG_CIFS_STATS
	  else {
		atomic_inc(&pTcon->num_t2renames);
	}
#endif
	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
CIFSSMBCopy(const int xid, struct cifsTconInfo *tcon, const char * fromName, 
            const __u16 target_tid, const char *toName, const int flags,
            const struct nls_table *nls_codepage)
{
	int rc = 0;
	COPY_REQ *pSMB = NULL;
	COPY_RSP *pSMBr = NULL;
	int bytes_returned;
	int name_len, name_len2;
	__u16 count;

	cFYI(1, ("In CIFSSMBCopy"));
copyRetry:
	rc = smb_init(SMB_COM_COPY, 1, tcon, (void **) &pSMB,
			(void **) &pSMBr);
	if (rc)
		return rc;

	pSMB->BufferFormat = 0x04;
	pSMB->Tid2 = target_tid;

	pSMB->Flags = cpu_to_le16(flags & COPY_TREE);

	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] = 0x04;     /* pad */
		/* protocol requires ASCII signature byte on Unicode string */
		pSMB->OldFileName[name_len + 1] = 0x00;
		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 /* 1st signature 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 copy = %d with %d files copied",
			rc, le16_to_cpu(pSMBr->CopyCount)));
	}
	if (pSMB)
		cifs_buf_release(pSMB);

	if (rc == -EAGAIN)
		goto copyRetry;

	return rc;
}

int
CIFSUnixCreateSymLink(const int xid, struct cifsTconInfo *tcon,
		      const char *fromName, const char *toName,
		      const struct nls_table *nls_codepage)
{
	TRANSACTION2_SPI_REQ *pSMB = NULL;
	TRANSACTION2_SPI_RSP *pSMBr = NULL;
	char *data_offset;
	int name_len;
	int name_len_target;
	int rc = 0;
	int bytes_returned = 0;
	__u16 params, param_offset, offset, byte_count;

	cFYI(1, ("In Symlink Unix style"));
createSymLinkRetry:
	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, fromName, 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(fromName, 530);
		name_len++;	/* trailing null */
		strncpy(pSMB->FileName, fromName, name_len);
	}
	params = 6 + name_len;
	pSMB->MaxSetupCount = 0;
	pSMB->Reserved = 0;
	pSMB->Flags = 0;
	pSMB->Timeout = 0;
	pSMB->Reserved2 = 0;
	param_offset = offsetof(struct smb_com_transaction2_spi_req,
                                     InformationLevel) - 4;
	offset = param_offset + params;

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

	pSMB->MaxParameterCount = cpu_to_le16(2);
	/* BB find exact max on data count below from sess */
	pSMB->MaxDataCount = cpu_to_le16(1000);
	pSMB->SetupCount = 1;
	pSMB->Reserved3 = 0;
	pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
	byte_count = 3 /* pad */  + params + name_len_target;
	pSMB->DataCount = cpu_to_le16(name_len_target);
	pSMB->ParameterCount = cpu_to_le16(params);
	pSMB->TotalDataCount = pSMB->DataCount;
	pSMB->TotalParameterCount = pSMB->ParameterCount;
	pSMB->ParameterOffset = cpu_to_le16(param_offset);
	pSMB->DataOffset = cpu_to_le16(offset);
	pSMB->InformationLevel = cpu_to_le16(SMB_SET_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 SetPathInfo (create symlink) = %d",
		      rc));
	}

	if (pSMB)
		cifs_buf_release(pSMB);

	if (rc == -EAGAIN)
		goto createSymLinkRetry;

	return rc;
}

int
CIFSUnixCreateHardLink(const int xid, struct cifsTconInfo *tcon,
		       const char *fromName, const char *toName,
		       const struct nls_table *nls_codepage)
{
	TRANSACTION2_SPI_REQ *pSMB = NULL;
	TRANSACTION2_SPI_RSP *pSMBr = NULL;
	char *data_offset;
	int name_len;
	int name_len_target;
	int rc = 0;
	int bytes_returned = 0;
	__u16 params, param_offset, offset, byte_count;

	cFYI(1, ("In Create Hard link Unix style"));
createHardLinkRetry:
	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, toName, 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(toName, 530);
		name_len++;	/* trailing null */
		strncpy(pSMB->FileName, toName, name_len);
	}
	params = 6 + name_len;
	pSMB->MaxSetupCount = 0;
	pSMB->Reserved = 0;
	pSMB->Flags = 0;
	pSMB->Timeout = 0;
	pSMB->Reserved2 = 0;
	param_offset = offsetof(struct smb_com_transaction2_spi_req,
                                     InformationLevel) - 4;
	offset = param_offset + params;

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

	pSMB->MaxParameterCount = cpu_to_le16(2);
	/* BB find exact max on data count below from sess*/
	pSMB->MaxDataCount = cpu_to_le16(1000);
	pSMB->SetupCount = 1;
	pSMB->Reserved3 = 0;
	pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
	byte_count = 3 /* pad */  + params + name_len_target;
	pSMB->ParameterCount = cpu_to_le16(params);
	pSMB->TotalParameterCount = pSMB->ParameterCount;
	pSMB->DataCount = cpu_to_le16(name_len_target);
	pSMB->TotalDataCount = pSMB->DataCount;
	pSMB->ParameterOffset = cpu_to_le16(param_offset);
	pSMB->DataOffset = cpu_to_le16(offset);
	pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_UNIX_HLINK);
	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 SetPathInfo (hard link) = %d", rc));
	}

	if (pSMB)
		cifs_buf_release(pSMB);
	if (rc == -EAGAIN)