Add smb copy function

fs/cifs/cifsproto.h

@@ -239,8 +239,9 @@ extern int CIFSSMBSeek(int xid,
 			int whence, unsigned long offset, long long *newoffset);
 
 extern int CIFSSMBCopy(int xid,
-			struct cifsTconInfo *ftcon,
-			char *fromName,
-			struct cifsTconInfo *ttcon,
-			char *toName, int ofun, int flags);
+			struct cifsTconInfo *source_tcon,
+			const char *fromName,
+			const __u16 target_tid,
+			const char *toName, const int flags,
+			const struct nls_table *nls_codepage);
 #endif			/* _CIFSPROTO_H */

fs/cifs/cifssmb.c

@@ -892,7 +892,6 @@ CIFSSMBRename(const int xid, struct cifsTconInfo *tcon,
 	}
 
 	pSMB->ByteCount = 1 /* 1st signature byte */  + name_len + name_len2;
-    /* we could also set search attributes but not needed */
 	pSMB->hdr.smb_buf_length += pSMB->ByteCount;
 	pSMB->ByteCount = cpu_to_le16(pSMB->ByteCount);
 
@@ -986,6 +985,77 @@ int CIFSSMBRenameOpenFile(const int xid,struct cifsTconInfo *pTcon,
 	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;
+
+        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;
+
+	if(flags & COPY_TREE)
+		pSMB->Flags |= COPY_TREE;
+	pSMB->Flags = cpu_to_le16(pSMB->Flags);
+
+        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 */
+        }
+
+        pSMB->ByteCount = 1 /* 1st signature byte */  + name_len + name_len2;
+        pSMB->hdr.smb_buf_length += pSMB->ByteCount;
+        pSMB->ByteCount = cpu_to_le16(pSMB->ByteCount);
+
+	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, pSMBr->CopyCount));
+	}
+	if (pSMB)
+		cifs_buf_release(pSMB);
+
+	if (rc == -EAGAIN)
+		goto copyRetry;
+
+	return rc;
+}
 
 int
 CIFSUnixCreateSymLink(const int xid, struct cifsTconInfo *tcon,