diff -urN unpatched/fs/cifs/cifspdu.h patched/fs/cifs/cifspdu.h
--- unpatched/fs/cifs/cifspdu.h	2009-09-04 21:46:00.000000000 +0200
+++ patched/fs/cifs/cifspdu.h	2010-03-30 16:13:34.000000000 +0200
@@ -48,6 +48,7 @@
 #define SMB_COM_RENAME                0x07 /* trivial response */
 #define SMB_COM_QUERY_INFORMATION     0x08 /* aka getattr */
 #define SMB_COM_SETATTR               0x09 /* trivial response */
+#define SMB_COM_WRITE                 0x0B
 #define SMB_COM_LOCKING_ANDX          0x24 /* trivial response */
 #define SMB_COM_COPY                  0x29 /* trivial rsp, fail filename ignrd*/
 #define SMB_COM_OPEN_ANDX             0x2D /* Legacy open for old servers */
@@ -1007,6 +1008,20 @@
 	__u16 ByteCount;
 } __attribute__((packed)) WRITE_RSP;
 
+typedef struct smb_com_legacy_write_req {
+	struct smb_hdr hdr;	/* wct = 14 */
+	__u16 Fid;
+	__u16 DataLength;
+	__u32 Offset;
+	__u16 Remaining;
+	__u16 ByteCount;
+} __attribute__((packed)) LEGACY_WRITE_REQ;
+
+typedef struct smb_com_legacy_write_rsp {
+	struct smb_hdr hdr;	/* wct = 6 */
+	__le16 Count;
+} __attribute__((packed)) LEGACY_WRITE_RSP;
+
 /* legacy read request for older servers */
 typedef struct smb_com_readx_req {
 	struct smb_hdr hdr;	/* wct = 10 */
diff -urN unpatched/fs/cifs/cifsproto.h patched/fs/cifs/cifsproto.h
--- unpatched/fs/cifs/cifsproto.h	2009-09-04 21:46:00.000000000 +0200
+++ patched/fs/cifs/cifsproto.h	2010-03-30 18:54:39.000000000 +0200
@@ -335,6 +335,8 @@
 			const int netfid, const unsigned int count,
 			const __u64 offset, unsigned int *nbytes,
 			struct kvec *iov, const int nvec, const int long_op);
+int CIFSSMBLegacyWrite0(const int xid, struct cifsTconInfo *tcon,
+			const int netfid, const __u64 offset);
 extern int CIFSGetSrvInodeNumber(const int xid, struct cifsTconInfo *tcon,
 			const unsigned char *searchName, __u64 *inode_number,
 			const struct nls_table *nls_codepage,
diff -urN unpatched/fs/cifs/cifssmb.c patched/fs/cifs/cifssmb.c
--- unpatched/fs/cifs/cifssmb.c	2009-09-04 21:46:00.000000000 +0200
+++ patched/fs/cifs/cifssmb.c	2010-03-30 16:15:14.000000000 +0200
@@ -1562,6 +1562,49 @@
 }
 
 int
+CIFSSMBLegacyWrite0(const int xid, struct cifsTconInfo *tcon,
+		    const int netfid, const __u64 offset)
+{
+	int rc = -EACCES;
+	LEGACY_WRITE_REQ *pSMB = NULL;
+	LEGACY_WRITE_RSP *pSMBr = NULL;
+	int bytes_returned;
+
+	/* cFYI(1,("legacywrite at %lld %d bytes",offset,count));*/
+	if (tcon->ses == NULL)
+		return -ECONNABORTED;
+
+	rc = smb_init(SMB_COM_WRITE, 5, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+	/* tcon and ses pointer are checked in smb_init */
+	if (tcon->ses->server == NULL)
+		return -ECONNABORTED;
+
+	pSMB->Fid = netfid;
+	if ((offset >> 32) > 0) /* can not handle big offset for old srv */
+		return -EIO;
+	pSMB->Offset = cpu_to_le32(offset & 0xFFFFFFFF);
+	pSMB->DataLength = 0;
+	pSMB->Remaining = 0;
+	pSMB->ByteCount = 0;
+
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 1);
+	cifs_stats_inc(&tcon->num_writes);
+	if (rc)
+		cFYI(1, "Send error in legacy write = %d", rc);
+
+	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
 CIFSSMBWrite2(const int xid, struct cifsTconInfo *tcon,
 	     const int netfid, const unsigned int count,
 	     const __u64 offset, unsigned int *nbytes, struct kvec *iov,
diff -urN unpatched/fs/cifs/inode.c patched/fs/cifs/inode.c
--- unpatched/fs/cifs/inode.c	2009-09-04 21:46:00.000000000 +0200
+++ patched/fs/cifs/inode.c	2010-03-30 18:56:08.000000000 +0200
@@ -1868,20 +1868,26 @@
 		if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
 			__u16 netfid;
 			int oplock = 0;
+			int open_disposition = (attrs->ia_size == 0)
+					? FILE_OVERWRITE : FILE_OPEN;
 
 			rc = SMBLegacyOpen(xid, pTcon, full_path,
-				FILE_OPEN, GENERIC_WRITE,
+				open_disposition, GENERIC_WRITE,
 				CREATE_NOT_DIR, &netfid, &oplock, NULL,
 				cifs_sb->local_nls,
 				cifs_sb->mnt_cifs_flags &
 					CIFS_MOUNT_MAP_SPECIAL_CHR);
 			if (rc == 0) {
-				unsigned int bytes_written;
-				rc = CIFSSMBWrite(xid, pTcon, netfid, 0,
-						  attrs->ia_size,
-						  &bytes_written, NULL,
-						  NULL, 1);
-				cFYI(1, "wrt seteof rc %d", rc);
+				if (open_disposition == FILE_OPEN) {
+					rc = CIFSSMBLegacyWrite0(xid, pTcon,
+						netfid, attrs->ia_size);
+					if (rc != 0) {
+						rc = CIFSSMBSetFileSize(xid,
+							pTcon, attrs->ia_size,
+							netfid, 0, false);
+					}
+					cFYI(1, "wrt seteof rc %d", rc);
+				}
 				CIFSSMBClose(xid, pTcon, netfid);
 			}
 		}