remove trailing white spaces from source code files

Trailing white spaces cause problems with git.
Signed-off-by: Mauricio Vasquez B <mauricio.vasquez@polito.it>

examples/cpp/FollyRequestContextSwitch.cc

@@ -35,7 +35,7 @@ int on_context_switch(struct pt_regs *ctx) {
 
   event.pid = bpf_get_current_pid_tgid();
   bpf_get_current_comm(&event.name, sizeof(event.name));
-  
+
   bpf_usdt_readarg(1, ctx, &event.old_addr);
   bpf_usdt_readarg(2, ctx, &event.new_addr);
 

examples/lua/sock-parse-http.lua

@@ -34,7 +34,7 @@ local prog = bpf.socket('lo', function (skb)
 	-- Fetch 4 bytes of TCP data and compare
 	local h = data(0, 4)
 	if h == 'HTTP' or h == 'GET ' or
-	   h == 'POST' or h == 'PUT ' or 
+	   h == 'POST' or h == 'PUT ' or
 	   h == 'HEAD' or h == 'DELE' then
 	   	-- If hash key doesn't exist, create it
 	   	-- otherwise increment counter

examples/networking/http_filter/http-parse-complete.c

@@ -2,21 +2,21 @@
 #include <net/sock.h>
 #include <bcc/proto.h>
 
-#define IP_TCP 	6   
+#define IP_TCP 	6
 #define ETH_HLEN 14
 
 struct Key {
 	u32 src_ip;               //source ip
 	u32 dst_ip;               //destination ip
 	unsigned short src_port;  //source port
-	unsigned short dst_port;  //destination port	
+	unsigned short dst_port;  //destination port
 };
 
 struct Leaf {
 	int timestamp;            //timestamp in ns
 };
 
-//BPF_TABLE(map_type, key_type, leaf_type, table_name, num_entry) 
+//BPF_TABLE(map_type, key_type, leaf_type, table_name, num_entry)
 //map <Key, Leaf>
 //tracing sessions having same Key(dst_ip, src_ip, dst_port,src_port)
 BPF_HASH(sessions, struct Key, struct Leaf, 1024);
@@ -40,7 +40,7 @@ int http_filter(struct __sk_buff *skb) {
 	struct ethernet_t *ethernet = cursor_advance(cursor, sizeof(*ethernet));
 	//filter IP packets (ethernet type = 0x0800)
 	if (!(ethernet->type == 0x0800)) {
-		goto DROP;	
+		goto DROP;
 	}
 
 	struct ip_t *ip = cursor_advance(cursor, sizeof(*ip));
@@ -69,16 +69,16 @@ int http_filter(struct __sk_buff *skb) {
 	//value to multiply * 4
 	//e.g. ip->hlen = 5 ; IP Header Length = 5 x 4 byte = 20 byte
 	ip_header_length = ip->hlen << 2;    //SHL 2 -> *4 multiply
-		
+
 	//calculate tcp header length
 	//value to multiply *4
 	//e.g. tcp->offset = 5 ; TCP Header Length = 5 x 4 byte = 20 byte
 	tcp_header_length = tcp->offset << 2; //SHL 2 -> *4 multiply
 
 	//calculate patload offset and length
-	payload_offset = ETH_HLEN + ip_header_length + tcp_header_length; 
+	payload_offset = ETH_HLEN + ip_header_length + tcp_header_length;
 	payload_length = ip->tlen - ip_header_length - tcp_header_length;
-		  
+
 	//http://stackoverflow.com/questions/25047905/http-request-minimum-size-in-bytes
 	//minimum length of http request is always geater than 7 bytes
 	//avoid invalid access memory

examples/networking/http_filter/http-parse-complete.py

@@ -3,7 +3,7 @@
 #Bertrone Matteo - Polytechnic of Turin
 #November 2015
 #
-#eBPF application that parses HTTP packets 
+#eBPF application that parses HTTP packets
 #and extracts (and prints on screen) the URL contained in the GET/POST request.
 #
 #eBPF program http_filter is used as SOCKET_FILTER attached to eth0 interface.
@@ -38,7 +38,7 @@ def toHex(s):
         if len(hv) == 1:
             hv = '0'+hv
         lst.append(hv)
-    
+
     return reduce(lambda x,y:x+y, lst)
 
 #print str until CR+LF
@@ -50,7 +50,7 @@ def printUntilCRLF(str):
           return
       print ("%c" % (str[k]), end = "")
     print("")
-    return  
+    return
 
 #cleanup function
 def cleanup():
@@ -71,7 +71,7 @@ def cleanup():
             del bpf_sessions[key]
       except:
         print("cleanup exception.")
-    return 
+    return
 
 #args
 def usage():
@@ -155,9 +155,9 @@ while 1:
 
   #convert packet into bytearray
   packet_bytearray = bytearray(packet_str)
-  
+
   #ethernet header length
-  ETH_HLEN = 14 
+  ETH_HLEN = 14
 
   #IP HEADER
   #https://tools.ietf.org/html/rfc791
@@ -166,18 +166,18 @@ while 1:
   # |Version|  IHL  |Type of Service|          Total Length         |
   # +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   #
-  #IHL : Internet Header Length is the length of the internet header 
+  #IHL : Internet Header Length is the length of the internet header
   #value to multiply * 4 byte
   #e.g. IHL = 5 ; IP Header Length = 5 * 4 byte = 20 byte
   #
-  #Total length: This 16-bit field defines the entire packet size, 
+  #Total length: This 16-bit field defines the entire packet size,
   #including header and data, in bytes.
 
   #calculate packet total length
   total_length = packet_bytearray[ETH_HLEN + 2]               #load MSB
   total_length = total_length << 8                            #shift MSB
   total_length = total_length + packet_bytearray[ETH_HLEN+3]  #add LSB
-  
+
   #calculate ip header length
   ip_header_length = packet_bytearray[ETH_HLEN]               #load Byte
   ip_header_length = ip_header_length & 0x0F                  #mask bits 0..3
@@ -189,18 +189,18 @@ while 1:
 
   ip_src = int(toHex(ip_src_str),16)
   ip_dst = int(toHex(ip_dst_str),16)
-  
-  #TCP HEADER 
+
+  #TCP HEADER
   #https://www.rfc-editor.org/rfc/rfc793.txt
-  #  12              13              14              15  
-  #  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 
+  #  12              13              14              15
+  #  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   # +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   # |  Data |           |U|A|P|R|S|F|                               |
   # | Offset| Reserved  |R|C|S|S|Y|I|            Window             |
   # |       |           |G|K|H|T|N|N|                               |
   # +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   #
-  #Data Offset: This indicates where the data begins.  
+  #Data Offset: This indicates where the data begins.
   #The TCP header is an integral number of 32 bits long.
   #value to multiply * 4 byte
   #e.g. DataOffset = 5 ; TCP Header Length = 5 * 4 byte = 20 byte
@@ -209,17 +209,17 @@ while 1:
   tcp_header_length = packet_bytearray[ETH_HLEN + ip_header_length + 12]  #load Byte
   tcp_header_length = tcp_header_length & 0xF0                            #mask bit 4..7
   tcp_header_length = tcp_header_length >> 2                              #SHR 4 ; SHL 2 -> SHR 2
-  
+
   #retrieve port source/dest
   port_src_str = packet_str[ETH_HLEN+ip_header_length:ETH_HLEN+ip_header_length+2]
   port_dst_str = packet_str[ETH_HLEN+ip_header_length+2:ETH_HLEN+ip_header_length+4]
-  
+
   port_src = int(toHex(port_src_str),16)
   port_dst = int(toHex(port_dst_str),16)
 
   #calculate payload offset
   payload_offset = ETH_HLEN + ip_header_length + tcp_header_length
-  
+
   #payload_string contains only packet payload
   payload_string = packet_str[(payload_offset):(len(packet_bytearray))]
 
@@ -238,14 +238,14 @@ while 1:
       #url entirely contained in first packet -> print it all
       printUntilCRLF(payload_string)
 
-      #delete current_Key from bpf_sessions, url already printed. current session not useful anymore 
+      #delete current_Key from bpf_sessions, url already printed. current session not useful anymore
       try:
         del bpf_sessions[current_Key]
       except:
         print ("error during delete from bpf map ")
-    else: 
-      #url NOT entirely contained in first packet   
-      #not found \r\n in payload. 
+    else:
+      #url NOT entirely contained in first packet
+      #not found \r\n in payload.
       #save current part of the payload_string in dictionary <key(ips,ipd,ports,portd),payload_string>
       local_dictionary[binascii.hexlify(current_Key)] = payload_string
   else:
@@ -253,17 +253,17 @@ while 1:
 
     #check if the packet belong to a session saved in bpf_sessions
     if (current_Key in bpf_sessions):
-      #check id the packet belong to a session saved in local_dictionary 
+      #check id the packet belong to a session saved in local_dictionary
       #(local_dictionary mantains HTTP GET/POST url not printed yet because splitted in N packets)
       if (binascii.hexlify(current_Key) in local_dictionary):
         #first part of the HTTP GET/POST url is already present in local dictionary (prev_payload_string)
         prev_payload_string = local_dictionary[binascii.hexlify(current_Key)]
-        #looking for CR+LF in current packet. 
+        #looking for CR+LF in current packet.
         if (crlf in payload_string):
           #last packet. containing last part of HTTP GET/POST url splitted in N packets.
           #append current payload
           prev_payload_string += payload_string
-          #print HTTP GET/POST url 
+          #print HTTP GET/POST url
           printUntilCRLF(prev_payload_string)
           #clean bpf_sessions & local_dictionary
           try:
@@ -284,7 +284,7 @@ while 1:
             except:
               print ("error deleting from map or dict")
           #update dictionary
-          local_dictionary[binascii.hexlify(current_Key)] = prev_payload_string  
+          local_dictionary[binascii.hexlify(current_Key)] = prev_payload_string
       else:
         #first part of the HTTP GET/POST url is NOT present in local dictionary
         #bpf_sessions contains invalid entry -> delete it

examples/networking/http_filter/http-parse-simple.c

@@ -2,7 +2,7 @@
 #include <net/sock.h>
 #include <bcc/proto.h>
 
-#define IP_TCP 	6   
+#define IP_TCP 	6
 #define ETH_HLEN 14
 
 /*eBPF program.
@@ -20,7 +20,7 @@ int http_filter(struct __sk_buff *skb) {
 	struct ethernet_t *ethernet = cursor_advance(cursor, sizeof(*ethernet));
 	//filter IP packets (ethernet type = 0x0800)
 	if (!(ethernet->type == 0x0800)) {
-		goto DROP;	
+		goto DROP;
 	}
 
 	struct ip_t *ip = cursor_advance(cursor, sizeof(*ip));
@@ -40,16 +40,16 @@ int http_filter(struct __sk_buff *skb) {
 	//value to multiply * 4
 	//e.g. ip->hlen = 5 ; IP Header Length = 5 x 4 byte = 20 byte
 	ip_header_length = ip->hlen << 2;    //SHL 2 -> *4 multiply
-		
+
 	//calculate tcp header length
 	//value to multiply *4
 	//e.g. tcp->offset = 5 ; TCP Header Length = 5 x 4 byte = 20 byte
 	tcp_header_length = tcp->offset << 2; //SHL 2 -> *4 multiply
 
 	//calculate patload offset and length
-	payload_offset = ETH_HLEN + ip_header_length + tcp_header_length; 
+	payload_offset = ETH_HLEN + ip_header_length + tcp_header_length;
 	payload_length = ip->tlen - ip_header_length - tcp_header_length;
-		  
+
 	//http://stackoverflow.com/questions/25047905/http-request-minimum-size-in-bytes
 	//minimum length of http request is always geater than 7 bytes
 	//avoid invalid access memory

examples/networking/http_filter/http-parse-simple.py

@@ -3,7 +3,7 @@
 #Bertrone Matteo - Polytechnic of Turin
 #November 2015
 #
-#eBPF application that parses HTTP packets 
+#eBPF application that parses HTTP packets
 #and extracts (and prints on screen) the URL contained in the GET/POST request.
 #
 #eBPF program http_filter is used as SOCKET_FILTER attached to eth0 interface.
@@ -90,9 +90,9 @@ while 1:
 
   #convert packet into bytearray
   packet_bytearray = bytearray(packet_str)
-  
+
   #ethernet header length
-  ETH_HLEN = 14 
+  ETH_HLEN = 14
 
   #IP HEADER
   #https://tools.ietf.org/html/rfc791
@@ -101,34 +101,34 @@ while 1:
   # |Version|  IHL  |Type of Service|          Total Length         |
   # +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   #
-  #IHL : Internet Header Length is the length of the internet header 
+  #IHL : Internet Header Length is the length of the internet header
   #value to multiply * 4 byte
   #e.g. IHL = 5 ; IP Header Length = 5 * 4 byte = 20 byte
   #
-  #Total length: This 16-bit field defines the entire packet size, 
+  #Total length: This 16-bit field defines the entire packet size,
   #including header and data, in bytes.
 
   #calculate packet total length
   total_length = packet_bytearray[ETH_HLEN + 2]               #load MSB
   total_length = total_length << 8                            #shift MSB
   total_length = total_length + packet_bytearray[ETH_HLEN+3]  #add LSB
-  
+
   #calculate ip header length
   ip_header_length = packet_bytearray[ETH_HLEN]               #load Byte
   ip_header_length = ip_header_length & 0x0F                  #mask bits 0..3
   ip_header_length = ip_header_length << 2                    #shift to obtain length
 
-  #TCP HEADER 
+  #TCP HEADER
   #https://www.rfc-editor.org/rfc/rfc793.txt
-  #  12              13              14              15  
-  #  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 
+  #  12              13              14              15
+  #  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   # +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   # |  Data |           |U|A|P|R|S|F|                               |
   # | Offset| Reserved  |R|C|S|S|Y|I|            Window             |
   # |       |           |G|K|H|T|N|N|                               |
   # +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   #
-  #Data Offset: This indicates where the data begins.  
+  #Data Offset: This indicates where the data begins.
   #The TCP header is an integral number of 32 bits long.
   #value to multiply * 4 byte
   #e.g. DataOffset = 5 ; TCP Header Length = 5 * 4 byte = 20 byte
@@ -137,10 +137,10 @@ while 1:
   tcp_header_length = packet_bytearray[ETH_HLEN + ip_header_length + 12]  #load Byte
   tcp_header_length = tcp_header_length & 0xF0                            #mask bit 4..7
   tcp_header_length = tcp_header_length >> 2                              #SHR 4 ; SHL 2 -> SHR 2
-  
+
   #calculate payload offset
   payload_offset = ETH_HLEN + ip_header_length + tcp_header_length
-  
+
   #print first line of the HTTP GET/POST request
   #line ends with 0xOD 0xOA (\r\n)
   #(if we want to print all the header print until \r\n\r\n)

examples/tracing/strlen_hist.py

@@ -10,7 +10,7 @@
 #
 # Copyright (c) PLUMgrid, Inc.
 # Licensed under the Apache License, Version 2.0 (the "License")
-# 
+#
 # Example output:
 # $ sudo ./strlen_hist.py
 # 22:12:52

src/cc/frontends/clang/tp_frontend_action.cc

@@ -122,7 +122,7 @@ static inline bool _is_tracepoint_struct_type(string const& type_name,
   //    (?:struct|class)\s+tracepoint__(\S+)__(\S+)
   // Not using std::regex because older versions of GCC don't support it yet.
   // E.g., the libstdc++ that ships with Ubuntu 14.04.
-  
+
   auto first_space_pos = type_name.find_first_of("\t ");
   if (first_space_pos == string::npos)
     return false;

src/cc/frontends/clang/tp_frontend_action.h

@@ -53,7 +53,7 @@ class TracepointTypeVisitor :
   clang::ASTContext &C;
   clang::DiagnosticsEngine &diag_;
   clang::Rewriter &rewriter_;
-  llvm::raw_ostream &out_; 
+  llvm::raw_ostream &out_;
 };
 
 class TracepointTypeConsumer : public clang::ASTConsumer {

src/cc/frontends/p4/compiler/compilationException.py

@@ -3,10 +3,10 @@
 
 class CompilationException(Exception):
     """Signals an error during compilation"""
-    def __init__(self, isBug, format, *message):        
+    def __init__(self, isBug, format, *message):
         # isBug: indicates that this is a compiler bug
         super(CompilationException, self).__init__()
-        
+
         assert isinstance(format, str)
         assert isinstance(isBug, bool)
         self.message = message

src/cc/frontends/p4/compiler/ebpfAction.py

@@ -225,10 +225,10 @@ class EbpfAction(EbpfActionBase):
                                         dst.asString,
                                         src.asString,
                                         size / 8)
-        elif (callee.name == "add" or 
-             callee.name == "bit_and" or 
-             callee.name == "bit_or" or 
-             callee.name == "bit_xor" or 
+        elif (callee.name == "add" or
+             callee.name == "bit_and" or
+             callee.name == "bit_or" or
+             callee.name == "bit_xor" or
              callee.name == "subtract"):
             size = self.checkSize(callee,
                                   [a.widthInBits() for a in args],
@@ -247,7 +247,7 @@ class EbpfAction(EbpfActionBase):
                                     args[1].asString,
                                     op,
                                     args[2].asString)
-        elif (callee.name == "add_to_field" or 
+        elif (callee.name == "add_to_field" or
               callee.name == "subtract_from_field"):
             size = self.checkSize(callee,
                                   [a.widthInBits() for a in args],

src/cc/frontends/p4/compiler/ebpfConditional.py

@@ -50,7 +50,7 @@ class EbpfConditional(object):
                 "{0}.{1}.{2}", base, einstance.name, node.name)
         else:
             raise CompilationException(True, "{0} Unexpected expression ", node)
-        
+
     def emitExpression(self, expression, serializer, program, toplevel):
         assert isinstance(serializer, ProgramSerializer)
         assert isinstance(program, ebpfProgram.EbpfProgram)
@@ -59,9 +59,9 @@ class EbpfConditional(object):
         left = expression.left
         op = expression.op
         right = expression.right
-        
+
         assert isinstance(op, str)
-        
+
         if op == "valid":
             self.emitNode(right, serializer, program)
             serializer.append(".valid")

src/cc/frontends/p4/compiler/ebpfCounter.py

@@ -27,7 +27,7 @@ class EbpfCounter(object):
 
         self.dataMapName = self.name
 
-        if ((hlircounter.binding is None) or 
+        if ((hlircounter.binding is None) or
             (hlircounter.binding[0] != P4_DIRECT)):
             raise NotSupportedException(
                 "{0}: counter which is not direct", hlircounter)

src/cc/frontends/p4/compiler/ebpfProgram.py

@@ -19,7 +19,7 @@ from compilationException import *
 
 class EbpfProgram(object):
     def __init__(self, name, hlir, isRouter, config):
-        """Representation of an EbpfProgram (in fact, 
+        """Representation of an EbpfProgram (in fact,
         a C program that is converted to EBPF)"""
         assert isinstance(hlir, HLIR)
         assert isinstance(isRouter, bool)

src/cc/frontends/p4/compiler/ebpfScalarType.py

@@ -51,7 +51,7 @@ class EbpfScalarType(EbpfType):
             return 4
         else:
             return 1  # Char array
-    
+
     def serialize(self, serializer):
         assert isinstance(serializer, ProgramSerializer)
         serializer.append(self.asString())

src/cc/frontends/p4/compiler/ebpfTable.py

@@ -84,8 +84,8 @@ class EbpfTableKey(object):
             matchType = f[1]
             mask = f[2]
 
-            if ((matchType is p4_match_type.P4_MATCH_TERNARY) or 
-                (matchType is p4_match_type.P4_MATCH_LPM) or 
+            if ((matchType is p4_match_type.P4_MATCH_TERNARY) or
+                (matchType is p4_match_type.P4_MATCH_LPM) or
                 (matchType is p4_match_type.P4_MATCH_RANGE)):
                 raise NotSupportedException(
                     False, "Match type {0}", matchType)
@@ -126,7 +126,7 @@ class EbpfTableKey(object):
     def fieldRank(field):
         assert isinstance(field, EbpfTableKeyField)
         return field.field.type.alignment()
-            
+
     def serializeType(self, serializer, keyTypeName):
         assert isinstance(serializer, ProgramSerializer)
         serializer.emitIndent()
@@ -193,7 +193,7 @@ class EbpfTable(object):
                 assert isinstance(ctr, ebpfCounter.EbpfCounter)
                 self.counters.append(ctr)
 
-        if (len(hlirtable.attached_meters) > 0 or 
+        if (len(hlirtable.attached_meters) > 0 or
             len(hlirtable.attached_registers) > 0):
             program.emitWarning("{0}: meters/registers {1}; ignored",
                                 hlirtable, NotSupportedException.archError)

src/cc/frontends/p4/compiler/p4toEbpf.py

@@ -6,7 +6,7 @@
 # Compiler from P4 to EBPF
 # (See http://www.slideshare.net/PLUMgrid/ebpf-and-linux-networking).
 # This compiler in fact generates a C source file
-# which can be compiled to EBPF using the LLVM compiler 
+# which can be compiled to EBPF using the LLVM compiler
 # with the ebpf target.
 #
 # Main entry point.

src/cc/frontends/p4/compiler/target.py

@@ -113,7 +113,7 @@ class KernelSamplesConfig(TargetConfig):
 #include "bpf_helpers.h"
 """
 
-    
+
 # Represents a target compiled by bcc that uses the TC
 class BccConfig(TargetConfig):
     def __init__(self):

src/cc/frontends/p4/compiler/typeFactory.py

@@ -13,7 +13,7 @@ class EbpfTypeFactory(object):
         name = hlirType.name
         if hlirType.name in self.type_map:
             retval = self.type_map[name]
-            if ((not asMetadata and isinstance(retval, EbpfMetadataType)) or 
+            if ((not asMetadata and isinstance(retval, EbpfMetadataType)) or
                 (asMetadata and isinstance(retval, EbpfHeaderType))):
                 raise CompilationException(
                     True, "Same type used both as a header and metadata {0}",

src/cc/frontends/p4/test/endToEndTest.py

@@ -26,7 +26,7 @@ class Base(object):
     def message(self, *args):
         if self.verbose:
             print(*args)
-            
+
 
 class Endpoint(Base):
     # a network interface really
@@ -47,7 +47,7 @@ class Endpoint(Base):
     def get_ip_address(self):
         return IPAddress(self.ipaddress)
 
-    
+
 class Node(Base):
     # Used to represent one of clt, sw, srv
     # Each lives in its own namespace
@@ -67,7 +67,7 @@ class Node(Base):
 
     def get_ns_name(self):
         return self.name
-    
+
     def get_ns(self):
         nsname = self.get_ns_name()
         ns = NetNS(nsname)
@@ -100,7 +100,7 @@ class NetworkBase(Base):
         Base.__init__(self)
         self.ipr = IPRoute()
         self.nodes = []
-        
+
     def add_node(self, node):
         assert isinstance(node, Node)
         self.nodes.append(node)
@@ -123,7 +123,7 @@ class NetworkBase(Base):
         # Ask a node to set the specified interface address
         if address is None:
             return
-        
+
         assert isinstance(node, Node)
         command = ["ip", "addr", "add", str(address) + "/" + str(mask),
                    "dev", str(ifname)]
@@ -132,7 +132,7 @@ class NetworkBase(Base):
 
     def create_link(self, src, dest):
         assert isinstance(src, Endpoint)
-        assert isinstance(dest, Endpoint) 
+        assert isinstance(dest, Endpoint)
 
         ifname = self.get_interface_name(src.parent, dest.parent)
         destname = self.get_interface_name(dest.parent, src.parent)
@@ -150,7 +150,7 @@ class NetworkBase(Base):
         # lost of set prior to moving to namespace
         self.set_interface_ipaddress(
             src.parent, ifname, src.ipaddress , src.prefixlen)
-        
+
         # Sef destination endpoint information
         ix = self.get_interface(destname)
         self.ipr.link("set", index=ix, address=dest.mac_addr)
@@ -178,7 +178,7 @@ class NetworkBase(Base):
             n.remove()
         self.ipr.close()
 
-        
+
 ### Here begins the concrete instantiation of the network
 # Network setup:
 # Each of these is a separate namespace.
@@ -191,7 +191,7 @@ class NetworkBase(Base):
 #      ----------                 --------                ---------
 #       10.0.0.11                                         10.0.0.10
 #
-        
+
 class SimulatedNetwork(NetworkBase):
     def __init__(self):
         NetworkBase.__init__(self)
@@ -219,7 +219,7 @@ class SimulatedNetwork(NetworkBase):
         assert isinstance(node, Node)
         assert isinstance(args, list)
         torun = __file__
-        args.insert(0, torun) 
+        args.insert(0, torun)
         args.insert(1, method)
         return node.execute(args)  # runs the command argv[0] method args
 
@@ -240,7 +240,7 @@ class SimulatedNetwork(NetworkBase):
         self.message("Set ARP mappings")
         self.client.set_arp(self.server_endpoint)
         self.server.set_arp(self.client_endpoint)
-        
+
     def setup_switch(self):
         # This method is run in the switch namespace.
         self.message("Compiling and loading BPF program")
@@ -254,7 +254,7 @@ class SimulatedNetwork(NetworkBase):
         routing_tbl = b.get_table("routing")
         routing_miss_tbl = b.get_table("ebpf_routing_miss")
         cnt_tbl = b.get_table("cnt")
-        
+
         self.message("Hooking up BPF classifiers using TC")
 
         interfname = self.get_interface_name(self.switch, self.server)
@@ -268,7 +268,7 @@ class SimulatedNetwork(NetworkBase):
         self.ipr.tc("add", "ingress", sw_clt_idx, "ffff:")
         self.ipr.tc("add-filter", "bpf", sw_clt_idx, ":1", fd=fn.fd,
                     name=fn.name, parent="ffff:", action="ok", classid=1)
-        
+
         self.message("Populating tables from the control plane")
         cltip = self.client_endpoint.get_ip_address()
         srvip = self.server_endpoint.get_ip_address()
@@ -276,17 +276,17 @@ class SimulatedNetwork(NetworkBase):
         # BCC does not support tbl.Leaf when the type contains a union,
         # so we have to make up the value type manually.  Unfortunately
         # these sizes are not portable...
-        
+
         class Forward(ctypes.Structure):
             _fields_ = [("port", ctypes.c_ushort)]
-        
+
         class Nop(ctypes.Structure):
             _fields_ = []
-            
+
         class Union(ctypes.Union):
             _fields_ = [("nop", Nop),
                         ("forward", Forward)]
-        
+
         class Value(ctypes.Structure):
             _fields_ = [("action", ctypes.c_uint),
                         ("u", Union)]
@@ -301,14 +301,14 @@ class SimulatedNetwork(NetworkBase):
             v1 = Value()
             v1.action = 1
             v1.u.forward.port = sw_clt_idx
-            
+
             v2 = Value()
             v2.action = 1;
             v2.u.forward.port = sw_srv_idx
 
             routing_tbl[routing_tbl.Key(int(cltip))] = v1
             routing_tbl[routing_tbl.Key(int(srvip))] = v2
-            
+
         self.message("Dumping table contents")
         for key, leaf in routing_tbl.items():
             self.message(str(IPAddress(key.key_field_0)),
@@ -322,7 +322,7 @@ class SimulatedNetwork(NetworkBase):
             raise Exception("Test failed")
         else:
             print("Test succeeded!")
-        
+
     def prepare_switch(self):
         self.message("Configuring switch")
         # Re-invokes this script in the switch namespace;
@@ -331,7 +331,7 @@ class SimulatedNetwork(NetworkBase):
         # but in the switch namespace
         self.run_method_in_node(self.switch, "setup_switch", [])
 
-        
+
 def compile(source, destination):
     try:
         status = subprocess.call(
@@ -344,7 +344,7 @@ def compile(source, destination):
     except OSError as e:
         print("Execution failed:", e, file=sys.stderr)
         raise e
-        
+
 def start_simulation():
     compile("testprograms/simple.p4", "simple.c")
     network = SimulatedNetwork()

src/cc/frontends/p4/test/testP4toEbpf.py

@@ -27,7 +27,7 @@ def set_error(kind, file, error):
 def is_root():
     # Is this code portable?
     return os.getuid() == 0
-        
+
 def main():
     testpath = "testprograms"
     destFolder = "testoutputs"
@@ -40,7 +40,7 @@ def main():
         print "Loading EBPF programs requires root priviledge."
         print "Will only test compilation, not loading."
         print "(Run with sudo to test program loading.)"
-    
+
     for f in files:
         path = os.path.join(testpath, f)
 
@@ -62,14 +62,14 @@ def main():
         else:
             # Try to load the compiled function
             if is_root():
-                try:                
+                try:
                     print("Compiling and loading BPF program")
                     b = BPF(src_file=destname, debug=0)
                     fn = b.load_func("ebpf_filter", BPF.SCHED_CLS)
                 except Exception as e:
                     print(e)
                     set_error("BPF error", path, str(e))
-                
+
         filesDone += 1
 
     print "Compiled", filesDone, "files", errors, "errors"
@@ -78,7 +78,7 @@ def main():
         for v in filesFailed[key]:
             print "\t", v
     exit(len(filesFailed) != 0)
-    
-        
+
+
 if __name__ == "__main__":
     main()

src/cc/libbpf.c

@@ -346,7 +346,7 @@ static int bpf_attach_tracing_event(int progfd, const char *event_path,
 void * bpf_attach_kprobe(int progfd, enum bpf_probe_attach_type attach_type, const char *ev_name,
                         const char *fn_name,
                         pid_t pid, int cpu, int group_fd,
-                        perf_reader_cb cb, void *cb_cookie) 
+                        perf_reader_cb cb, void *cb_cookie)
 {
   int kfd;
   char buf[256];
@@ -367,7 +367,7 @@ void * bpf_attach_kprobe(int progfd, enum bpf_probe_attach_type attach_type, con
     goto error;
   }
 
-  snprintf(buf, sizeof(buf), "%c:%ss/%s %s", attach_type==BPF_PROBE_ENTRY ? 'p' : 'r', 
+  snprintf(buf, sizeof(buf), "%c:%ss/%s %s", attach_type==BPF_PROBE_ENTRY ? 'p' : 'r',
 			event_type, new_name, fn_name);
   if (write(kfd, buf, strlen(buf)) < 0) {
     if (errno == EINVAL)
@@ -380,10 +380,10 @@ void * bpf_attach_kprobe(int progfd, enum bpf_probe_attach_type attach_type, con
   if (access("/sys/kernel/debug/tracing/instances", F_OK) != -1) {
     snprintf(buf, sizeof(buf), "/sys/kernel/debug/tracing/instances/bcc_%d", getpid());
     if (access(buf, F_OK) == -1) {
-      if (mkdir(buf, 0755) == -1) 
+      if (mkdir(buf, 0755) == -1)
         goto retry;
     }
-    n = snprintf(buf, sizeof(buf), "/sys/kernel/debug/tracing/instances/bcc_%d/events/%ss/%s", 
+    n = snprintf(buf, sizeof(buf), "/sys/kernel/debug/tracing/instances/bcc_%d/events/%ss/%s",
              getpid(), event_type, new_name);
     if (n < sizeof(buf) && bpf_attach_tracing_event(progfd, buf, reader, pid, cpu, group_fd) == 0)
 	  goto out;
@@ -406,7 +406,7 @@ error:
 void * bpf_attach_uprobe(int progfd, enum bpf_probe_attach_type attach_type, const char *ev_name,
                         const char *binary_path, uint64_t offset,
                         pid_t pid, int cpu, int group_fd,
-                        perf_reader_cb cb, void *cb_cookie) 
+                        perf_reader_cb cb, void *cb_cookie)
 {
   int kfd;
   char buf[PATH_MAX];
@@ -428,7 +428,7 @@ void * bpf_attach_uprobe(int progfd, enum bpf_probe_attach_type attach_type, con
     goto error;
   }
 
-  n = snprintf(buf, sizeof(buf), "%c:%ss/%s %s:0x%lx", attach_type==BPF_PROBE_ENTRY ? 'p' : 'r', 
+  n = snprintf(buf, sizeof(buf), "%c:%ss/%s %s:0x%lx", attach_type==BPF_PROBE_ENTRY ? 'p' : 'r',
 			event_type, new_name, binary_path, offset);
   if (n >= sizeof(buf)) {
     close(kfd);

src/cc/libbpf.h

@@ -50,7 +50,7 @@ typedef void (*perf_reader_cb)(void *cb_cookie, int pid, uint64_t callchain_num,
 typedef void (*perf_reader_raw_cb)(void *cb_cookie, void *raw, int raw_size);
 typedef void (*perf_reader_lost_cb)(uint64_t lost);
 
-void * bpf_attach_kprobe(int progfd, enum bpf_probe_attach_type attach_type, 
+void * bpf_attach_kprobe(int progfd, enum bpf_probe_attach_type attach_type,
                         const char *ev_name, const char *fn_name,
                         pid_t pid, int cpu, int group_fd,
                         perf_reader_cb cb, void *cb_cookie);

src/lua/bpf/bpf.lua

@@ -258,7 +258,7 @@ local function valloc(size, blank)
 	stack_top = math.ceil(stack_top/8)*8
 	-- Current kernel version doesn't support ARG_PTR_TO_RAW_STACK
 	-- so we always need to have memory initialized, remove this when supported
-	if blank then 
+	if blank then
 		if type(blank) == 'string' then
 			local sp = 0
 			while sp < size do
@@ -276,7 +276,7 @@ local function valloc(size, blank)
 				emit(BPF.MEM + BPF.STX + BPF.DW, 10, 0, -sp, 0)
 			end
 		else error('NYI: will with unknown type '..type(blank)) end
-	end 
+	end
 	return stack_top
 end
 
@@ -604,7 +604,7 @@ local function MAP_DEL(map_var, key, key_imm)
 end
 
 local function MAP_SET(map_var, key, key_imm, src)
-	local map = V[map_var].const	
+	local map = V[map_var].const
 	-- Delete when setting nil
 	if V[src].type == ffi.typeof('void') then
 		return MAP_DEL(map_var, key, key_imm)

src/lua/bpf/builtins.lua

@@ -205,7 +205,7 @@ builtins[ffi.copy] = function (e, ret, dst, src)
 		-- TODO: identify cheap register move
 		-- TODO: identify copy to/from stack
 		error('NYI: ffi.copy(dst, src) - src is neither BPF map/socket buffer or probe')
-	end	
+	end
 end
 -- print(format, ...) builtin changes semantics from Lua print(...)
 -- the first parameter has to be format and only reduced set of conversion specificers

src/lua/bpf/cdef.lua

@@ -170,7 +170,7 @@ function M.typename(v)
 	return string.match(tostring(ffi.typeof(v)), '<([^>]+)')
 end
 
--- Reflect if cdata type can be pointer (accepts array or pointer) 
+-- Reflect if cdata type can be pointer (accepts array or pointer)
 function M.isptr(v, noarray)
 	local ctname = M.typename(v)
 	if ctname then

src/lua/bpf/elf.lua

@@ -227,7 +227,7 @@ ffi.metatype('struct Elf_object', {
 										end
 										-- Match symbol name against pattern
 										if pattern and string.match(name, k) or k == name then
-											return sym[0]	
+											return sym[0]
 										end
 									end
 								end

src/lua/bpf/proto.lua

@@ -222,7 +222,7 @@ local function next_offset(e, var, type, off, mask, shift)
 	-- Finalize relative offset
 	if mask then
 		e.emit(BPF.ALU + BPF.AND + BPF.K, tmp_reg, 0, 0, mask)
-	end	
+	end
 	if shift then
 		local op = BPF.LSH
 		if shift < 0 then

tests/python/test_bpf_log.py

@@ -27,7 +27,7 @@ repeat = """
 end = """
            y = t1.lookup(&x);
            x = *y;
-           return 0; 
+           return 0;
         }
       """
 for i in range(0,300):
@@ -42,7 +42,7 @@ class TestBPFProgLoad(TestCase):
 
     def tearDown(self):
         self.fp.close()
-        
+
 
     def test_log_debug(self):
         b = BPF(text=text, debug=2)

tests/python/test_brb.c

@@ -130,7 +130,7 @@ static int br_common(struct __sk_buff *skb, int which_br) {
                  index = 0;
                  if (which_br == 1)
                      rtrif_p = br1_rtr.lookup(&index);
-                 else 
+                 else
                      rtrif_p = br2_rtr.lookup(&index);
                  if (rtrif_p)
                      bpf_clone_redirect(skb, *rtrif_p, 0);

tests/python/test_brb.py

@@ -13,7 +13,7 @@
 #
 # The vm1, vm2 and router are implemented as namespaces.
 # The bridge is implemented with limited functionality in bpf program.
-# 
+#
 # vm1 and vm2 are in different subnet. For vm1 to communicate to vm2,
 # the packet will have to travel from vm1 to pem, bridge1, router, bridge2, pem, and
 # then come to vm2.
@@ -33,7 +33,7 @@
 # 8: PING 200.1.1.1 (200.1.1.1) 56(84) bytes of data.
 # 8: 64 bytes from 200.1.1.1: icmp_req=1 ttl=63 time=0.074 ms
 # 8: 64 bytes from 200.1.1.1: icmp_req=2 ttl=63 time=0.061 ms
-# 8: 
+# 8:
 # 8: --- 200.1.1.1 ping statistics ---
 # 8: 2 packets transmitted, 2 received, 0% packet loss, time 999ms
 # 8: rtt min/avg/max/mdev = 0.061/0.067/0.074/0.010 ms
@@ -41,24 +41,24 @@
 # 8: [  5]  0.0- 1.0 sec  4.00 GBytes  34.3 Gbits/sec
 # 8: Starting netserver with host 'IN(6)ADDR_ANY' port '12865' and family AF_UNSPEC
 # 8: MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 200.1.1.1 (200.1.1.1) port 0 AF_INET : demo
-# 8: Recv   Send    Send                          
-# 8: Socket Socket  Message  Elapsed              
-# 8: Size   Size    Size     Time     Throughput  
-# 8: bytes  bytes   bytes    secs.    10^6bits/sec  
-# 8: 
-# 8:  87380  16384  65160    1.00     41991.68   
+# 8: Recv   Send    Send
+# 8: Socket Socket  Message  Elapsed
+# 8: Size   Size    Size     Time     Throughput
+# 8: bytes  bytes   bytes    secs.    10^6bits/sec
+# 8:
+# 8:  87380  16384  65160    1.00     41991.68
 # 8: MIGRATED TCP REQUEST/RESPONSE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 200.1.1.1 (200.1.1.1) port 0 AF_INET : demo : first burst 0
 # 8: Local /Remote
 # 8: Socket Size   Request  Resp.   Elapsed  Trans.
-# 8: Send   Recv   Size     Size    Time     Rate         
-# 8: bytes  Bytes  bytes    bytes   secs.    per sec   
-# 8: 
-# 8: 16384  87380  1        1       1.00     48645.53   
-# 8: 16384  87380 
+# 8: Send   Recv   Size     Size    Time     Rate
+# 8: bytes  Bytes  bytes    bytes   secs.    per sec
+# 8:
+# 8: 16384  87380  1        1       1.00     48645.53
+# 8: 16384  87380
 # 8: .
 # 8: ----------------------------------------------------------------------
 # 8: Ran 1 test in 11.296s
-# 8: 
+# 8:
 # 8: OK
 
 from ctypes import c_uint

tests/python/test_brb2.py

@@ -14,7 +14,7 @@
 # The vm1, vm2 and router are implemented as namespaces.
 # The linux bridge device is used to provice bridge functionality.
 # pem bpf will be attached to related network devices for vm1, vm1, bridge1 and bridge2.
-# 
+#
 # vm1 and vm2 are in different subnet. For vm1 to communicate to vm2,
 # the packet will have to travel from vm1 to pem, bridge1, router, bridge2, pem, and
 # then come to vm2.
@@ -26,7 +26,7 @@
 # 9: PING 200.1.1.1 (200.1.1.1) 56(84) bytes of data.
 # 9: 64 bytes from 200.1.1.1: icmp_req=1 ttl=63 time=0.090 ms
 # 9: 64 bytes from 200.1.1.1: icmp_req=2 ttl=63 time=0.032 ms
-# 9: 
+# 9:
 # 9: --- 200.1.1.1 ping statistics ---
 # 9: 2 packets transmitted, 2 received, 0% packet loss, time 999ms
 # 9: rtt min/avg/max/mdev = 0.032/0.061/0.090/0.029 ms
@@ -34,24 +34,24 @@
 # 9: [  5]  0.0- 1.0 sec  3.80 GBytes  32.6 Gbits/sec
 # 9: Starting netserver with host 'IN(6)ADDR_ANY' port '12865' and family AF_UNSPEC
 # 9: MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 200.1.1.1 (200.1.1.1) port 0 AF_INET : demo
-# 9: Recv   Send    Send                          
-# 9: Socket Socket  Message  Elapsed              
-# 9: Size   Size    Size     Time     Throughput  
-# 9: bytes  bytes   bytes    secs.    10^6bits/sec  
-# 9: 
-# 9:  87380  16384  65160    1.00     39940.46   
+# 9: Recv   Send    Send
+# 9: Socket Socket  Message  Elapsed
+# 9: Size   Size    Size     Time     Throughput
+# 9: bytes  bytes   bytes    secs.    10^6bits/sec
+# 9:
+# 9:  87380  16384  65160    1.00     39940.46
 # 9: MIGRATED TCP REQUEST/RESPONSE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 200.1.1.1 (200.1.1.1) port 0 AF_INET : demo : first burst 0
 # 9: Local /Remote
 # 9: Socket Size   Request  Resp.   Elapsed  Trans.
-# 9: Send   Recv   Size     Size    Time     Rate         
-# 9: bytes  Bytes  bytes    bytes   secs.    per sec   
-# 9: 
-# 9: 16384  87380  1        1       1.00     46387.80   
-# 9: 16384  87380 
+# 9: Send   Recv   Size     Size    Time     Rate
+# 9: bytes  Bytes  bytes    bytes   secs.    per sec
+# 9:
+# 9: 16384  87380  1        1       1.00     46387.80
+# 9: 16384  87380
 # 9: .
 # 9: ----------------------------------------------------------------------
 # 9: Ran 1 test in 7.495s
-# 9: 
+# 9:
 # 9: OK
 
 from ctypes import c_uint
@@ -87,7 +87,7 @@ class TestBPFSocket(TestCase):
         ipdb.interfaces[veth_br_2_pem].up().commit()
         subprocess.call(["sysctl", "-q", "-w", "net.ipv6.conf." + veth_pem_2_br + ".disable_ipv6=1"])
         subprocess.call(["sysctl", "-q", "-w", "net.ipv6.conf." + veth_br_2_pem + ".disable_ipv6=1"])
-        
+
         # set up the bridge and add router interface as one of its slaves
         with ipdb.create(ifname=br, kind="bridge") as br1:
             br1.add_port(ipdb.interfaces[veth_pem_2_br])

tests/python/test_uprobes.py

@@ -84,7 +84,7 @@ int count(struct pt_regs *ctx) {
         libc = ctypes.CDLL("libc.so.6", use_errno=True)
 
         # Need to find path to libz.so.1
-        libz_path = None 
+        libz_path = None
         p = subprocess.Popen(["ldconfig", "-p"], stdout=subprocess.PIPE)
         for l in p.stdout:
             n = l.split()
@@ -102,7 +102,7 @@ int count(struct pt_regs *ctx) {
             if libc.unshare(0x00020000) == -1:
                 e = ctypes.get_errno()
                 raise OSError(e, errno.errorcode[e])
-        
+
             # Remount root MS_REC|MS_PRIVATE
             if libc.mount(None, "/", None, (1<<14)|(1<<18) , None) == -1:
                 e = ctypes.get_errno()
@@ -119,7 +119,7 @@ int count(struct pt_regs *ctx) {
             libz.zlibVersion()
             time.sleep(5)
             os._exit(0)
-            
+
         libname = "/tmp/libz.so.1"
         symname = "zlibVersion"
         text = text.replace("PID", "%d" % child_pid)
@@ -131,6 +131,6 @@ int count(struct pt_regs *ctx) {
         b.detach_uretprobe(name=libname, sym=symname, pid=child_pid)
         b.detach_uprobe(name=libname, sym=symname, pid=child_pid)
         os.wait()
- 
+
 if __name__ == "__main__":
     unittest.main()

tools/execsnoop.py

@@ -30,7 +30,7 @@ examples = """examples:
     ./execsnoop -x        # include failed exec()s
     ./execsnoop -t        # include timestamps
     ./execsnoop -n main   # only print command lines containing "main"
-    ./execsnoop -l tpkg   # only print command where arguments contains "tpkg" 
+    ./execsnoop -l tpkg   # only print command where arguments contains "tpkg"
 """
 parser = argparse.ArgumentParser(
     description="Trace exec() syscalls",