[CIFS] Add support for legacy servers part seven. Fix open for write,

begin implementation of Win9x style set file size via open then
write of zero bytes.

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

fs/cifs/cifssmb.c

@@ -766,7 +766,7 @@ SMBLegacyOpen(const int xid, struct cifsTconInfo *tcon,
         if(create_options & CREATE_OPTION_SPECIAL)
                 pSMB->FileAttributes = cpu_to_le16(ATTR_SYSTEM);
         else
-                pSMB->FileAttributes = cpu_to_le16(ATTR_NORMAL);
+                pSMB->FileAttributes = cpu_to_le16(0/*ATTR_NORMAL*/); /* BB FIXME */
 
 	/* if ((omode & S_IWUGO) == 0)
 		pSMB->FileAttributes |= cpu_to_le32(ATTR_READONLY);*/
@@ -777,6 +777,8 @@ SMBLegacyOpen(const int xid, struct cifsTconInfo *tcon,
 	/* BB FIXME BB */
 /*	pSMB->CreateOptions = cpu_to_le32(create_options & CREATE_OPTIONS_MASK); */
 	/* BB FIXME END BB */
+
+	pSMB->Sattr = cpu_to_le16(ATTR_HIDDEN | ATTR_SYSTEM | ATTR_DIRECTORY);
 	pSMB->OpenFunction = convert_disposition(openDisposition);
 	count += name_len;
 	pSMB->hdr.smb_buf_length += count;
@@ -3689,7 +3691,7 @@ CIFSSMBSetEOF(const int xid, struct cifsTconInfo *tcon, const char *fileName,
 				     PATH_MAX, nls_codepage, remap);
 		name_len++;	/* trailing null */
 		name_len *= 2;
-	} else {		/* BB improve the check for buffer overruns BB */
+	} else {	/* BB improve the check for buffer overruns BB */
 		name_len = strnlen(fileName, PATH_MAX);
 		name_len++;	/* trailing null */
 		strncpy(pSMB->FileName, fileName, name_len);
@@ -3697,7 +3699,7 @@ CIFSSMBSetEOF(const int xid, struct cifsTconInfo *tcon, const char *fileName,
 	params = 6 + name_len;
 	data_count = sizeof (struct file_end_of_file_info);
 	pSMB->MaxParameterCount = cpu_to_le16(2);
-	pSMB->MaxDataCount = cpu_to_le16(1000);	/* BB find max SMB size from sess */
+	pSMB->MaxDataCount = cpu_to_le16(4100);
 	pSMB->MaxSetupCount = 0;
 	pSMB->Reserved = 0;
 	pSMB->Flags = 0;
@@ -4079,7 +4081,7 @@ CIFSSMBUnixSetPerms(const int xid, struct cifsTconInfo *tcon,
 				     PATH_MAX, nls_codepage, remap);
 		name_len++;	/* trailing null */
 		name_len *= 2;
-	} else {		/* BB improve the check for buffer overruns BB */
+	} else {	/* BB improve the check for buffer overruns BB */
 		name_len = strnlen(fileName, PATH_MAX);
 		name_len++;	/* trailing null */
 		strncpy(pSMB->FileName, fileName, name_len);

fs/cifs/inode.c

@@ -1030,6 +1030,14 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
 					/* now that we found one valid file
 					   handle no sense continuing to loop
 					   trying others, so break here */
+					/* if(rc == -EINVAL) {
+						int bytes_written;
+						rc = CIFSSMBWrite(xid, pTcon,
+							nfid, 0,
+							attrs->ia_size, 
+							&bytes_written,
+							NULL, NULL, long_op);
+					} */
 					break;
 				}
 			}
@@ -1048,6 +1056,13 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
 					   cifs_sb->mnt_cifs_flags &
 						CIFS_MOUNT_MAP_SPECIAL_CHR);
 			cFYI(1, (" SetEOF by path (setattrs) rc = %d", rc));
+			/* if(rc == -EINVAL)
+				old_style_set_eof_via_write(xid, pTcon, 
+						full_path, 
+						attrs->ia_size,
+						cifs_sb->local_nls,
+						cifs_sb->mnt_cifs_flags &
+						  CIFS_MOUNT_MAP_SPECIAL_CHR);*/
 		}
 
 		/* Server is ok setting allocation size implicitly - no need