d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add support for receiving and setting flowtype, flowid and RSS bucket

Browse Source 
information as part of recvmsg().

This is primarily used for debugging/verification of the various
processing paths in the IP, PCB and driver layers.

Unfortunately the current implementation of the control message path
results in a ~10% or so drop in UDP frame throughput when it's used.

Differential Revision:	https://reviews.freebsd.org/D527
Reviewed by:	grehan
This commit is contained in:
Adrian Chadd 2014-09-09 01:45:39 +00:00
parent b174de323a
commit 9d3ddf4384
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=271293
5 changed files with 105 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
sys/netinet/in.h
View File

@ -492,6 +492,8 @@ __END_DECLS
#define IP_FLOWID 90 /* get flow id for the given socket/inp */
#define IP_FLOWTYPE 91 /* get flow type (M_HASHTYPE) */
#define IP_RSSBUCKETID 92 /* get RSS flowid -> bucket mapping */
#define IP_RECVFLOWID 93 /* bool; receive IP flowid/flowtype w/ datagram */
#define IP_RECVRSSBUCKETID 94 /* bool; receive IP RSS bucket id w/ datagram */
/*
* Defaults and limits for options

2
sys/netinet/in_pcb.h
View File

@ -549,6 +549,8 @@ short inp_so_options(const struct inpcb *inp);
#define INP_REUSEADDR 0x00000020 /* SO_REUSEADDR option is set */
#define INP_BINDMULTI 0x00000040 /* IP_BINDMULTI option is set */
#define INP_RSS_BUCKET_SET 0x00000080 /* IP_RSS_LISTEN_BUCKET is set */
#define INP_RECVFLOWID 0x00000100 /* populate recv datagram with flow info */
#define INP_RECVRSSBUCKETID 0x00000200 /* populate recv datagram with bucket id */
/*
* Flags passed to in_pcblookup*() functions.

37
sys/netinet/ip_input.c
View File

@ -1662,6 +1662,43 @@ ip_savecontrol(struct inpcb *inp, struct mbuf **mp, struct ip *ip,
if (*mp)
mp = &(*mp)->m_next;
}
if (inp->inp_flags2 & INP_RECVFLOWID) {
uint32_t flowid, flow_type;
flowid = m->m_pkthdr.flowid;
flow_type = M_HASHTYPE_GET(m);
/*
* XXX should handle the failure of one or the
* other - don't populate both?
*/
*mp = sbcreatecontrol((caddr_t) &flowid,
sizeof(uint32_t), IP_FLOWID, IPPROTO_IP);
if (*mp)
mp = &(*mp)->m_next;
*mp = sbcreatecontrol((caddr_t) &flow_type,
sizeof(uint32_t), IP_FLOWTYPE, IPPROTO_IP);
if (*mp)
mp = &(*mp)->m_next;
}
#ifdef RSS
if (inp->inp_flags2 & INP_RECVRSSBUCKETID) {
uint32_t flowid, flow_type;
uint32_t rss_bucketid;
flowid = m->m_pkthdr.flowid;
flow_type = M_HASHTYPE_GET(m);
if (rss_hash2bucket(flowid, flow_type, &rss_bucketid) == 0) {
*mp = sbcreatecontrol((caddr_t) &rss_bucketid,
sizeof(uint32_t), IP_RSSBUCKETID, IPPROTO_IP);
if (*mp)
mp = &(*mp)->m_next;
}
}
#endif
}
/*

18
sys/netinet/ip_output.c
View File

@ -1016,6 +1016,10 @@ ip_ctloutput(struct socket *so, struct sockopt *sopt)
case IP_ONESBCAST:
case IP_DONTFRAG:
case IP_RECVTOS:
case IP_RECVFLOWID:
#ifdef RSS
case IP_RECVRSSBUCKETID:
#endif
error = sooptcopyin(sopt, &optval, sizeof optval,
sizeof optval);
if (error)
@ -1094,6 +1098,9 @@ ip_ctloutput(struct socket *so, struct sockopt *sopt)
case IP_BINDMULTI:
OPTSET2(INP_BINDMULTI, optval);
break;
case IP_RECVFLOWID:
OPTSET2(INP_RECVFLOWID, optval);
break;
#ifdef RSS
case IP_RSS_LISTEN_BUCKET:
if ((optval >= 0) &&
@ -1104,6 +1111,9 @@ ip_ctloutput(struct socket *so, struct sockopt *sopt)
error = EINVAL;
}
break;
case IP_RECVRSSBUCKETID:
OPTSET2(INP_RECVRSSBUCKETID, optval);
break;
#endif
}
break;
@ -1219,8 +1229,10 @@ ip_ctloutput(struct socket *so, struct sockopt *sopt)
case IP_BINDMULTI:
case IP_FLOWID:
case IP_FLOWTYPE:
case IP_RECVFLOWID:
#ifdef RSS
case IP_RSSBUCKETID:
case IP_RECVRSSBUCKETID:
#endif
switch (sopt->sopt_name) {
@ -1290,6 +1302,9 @@ ip_ctloutput(struct socket *so, struct sockopt *sopt)
case IP_FLOWTYPE:
optval = inp->inp_flowtype;
break;
case IP_RECVFLOWID:
optval = OPTBIT2(INP_RECVFLOWID);
break;
#ifdef RSS
case IP_RSSBUCKETID:
retval = rss_hash2bucket(inp->inp_flowid,
@ -1300,6 +1315,9 @@ ip_ctloutput(struct socket *so, struct sockopt *sopt)
else
error = EINVAL;
break;
case IP_RECVRSSBUCKETID:
optval = OPTBIT2(INP_RECVRSSBUCKETID);
break;
#endif
case IP_BINDMULTI:
optval = OPTBIT2(INP_BINDMULTI);

46
sys/netinet/udp_usrreq.c
View File

@ -43,6 +43,7 @@ __FBSDID("$FreeBSD$");
#include "opt_inet.h"
#include "opt_inet6.h"
#include "opt_ipsec.h"
#include "opt_rss.h"
#include <sys/param.h>
#include <sys/domain.h>
@ -1084,6 +1085,9 @@ udp_output(struct inpcb *inp, struct mbuf *m, struct sockaddr *addr,
u_char tos;
uint8_t pr;
uint16_t cscov = 0;
uint32_t flowid = 0;
int flowid_type = 0;
int use_flowid = 0;
/*
* udp_output() may need to temporarily bind or connect the current
@ -1147,6 +1151,32 @@ udp_output(struct inpcb *inp, struct mbuf *m, struct sockaddr *addr,
tos = *(u_char *)CMSG_DATA(cm);
break;
case IP_FLOWID:
if (cm->cmsg_len != CMSG_LEN(sizeof(uint32_t))) {
error = EINVAL;
break;
}
flowid = *(uint32_t *) CMSG_DATA(cm);
break;
case IP_FLOWTYPE:
if (cm->cmsg_len != CMSG_LEN(sizeof(uint32_t))) {
error = EINVAL;
break;
}
flowid_type = *(uint32_t *) CMSG_DATA(cm);
use_flowid = 1;
break;
#ifdef RSS
case IP_RSSBUCKETID:
if (cm->cmsg_len != CMSG_LEN(sizeof(uint32_t))) {
error = EINVAL;
break;
}
/* This is just a placeholder for now */
break;
#endif /* RSS */
default:
error = ENOPROTOOPT;
break;
@ -1395,6 +1425,22 @@ udp_output(struct inpcb *inp, struct mbuf *m, struct sockaddr *addr,
((struct ip *)ui)->ip_tos = tos; /* XXX */
UDPSTAT_INC(udps_opackets);
/*
* Setup flowid / RSS information for outbound socket.
*
* Once the UDP code decides to set a flowid some other way,
* this allows the flowid to be overridden by userland.
*/
if (use_flowid) {
m->m_flags |= M_FLOWID;
m->m_pkthdr.flowid = flowid;
M_HASHTYPE_SET(m, flowid_type);
}
#ifdef RSS
ipflags |= IP_NODEFAULTFLOWID;
#endif /* RSS */
if (unlock_udbinfo == UH_WLOCKED)
INP_HASH_WUNLOCK(pcbinfo);
else if (unlock_udbinfo == UH_RLOCKED)