Date: Thu, 22 Mar 2018 20:21:05 +0000 (UTC) From: Sean Bruno <sbruno@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r331373 - head/sys/netinet6 Message-ID: <201803222021.w2MKL5Aa090788@repo.freebsd.org>
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Author: sbruno Date: Thu Mar 22 20:21:05 2018 New Revision: 331373 URL: https://svnweb.freebsd.org/changeset/base/331373 Log: Improve write locking in ip6_ctloutput() with macros. Submitted by: Jason Eggleston <jason@eggnet.com> Sponsored by: Limelight Networks Differential Revision: https://reviews.freebsd.org/D14620 Modified: head/sys/netinet6/ip6_output.c Modified: head/sys/netinet6/ip6_output.c ============================================================================== --- head/sys/netinet6/ip6_output.c Thu Mar 22 19:49:37 2018 (r331372) +++ head/sys/netinet6/ip6_output.c Thu Mar 22 20:21:05 2018 (r331373) @@ -1596,23 +1596,34 @@ do { \ } while (/*CONSTCOND*/ 0) #define OPTBIT(bit) (in6p->inp_flags & (bit) ? 1 : 0) -#define OPTSET2(bit, val) do { \ - INP_WLOCK(in6p); \ +#define OPTSET2_N(bit, val) do { \ if (val) \ in6p->inp_flags2 |= bit; \ else \ in6p->inp_flags2 &= ~bit; \ +} while (0) +#define OPTSET2(bit, val) do { \ + INP_WLOCK(in6p); \ + OPTSET2_N(bit, val); \ INP_WUNLOCK(in6p); \ } while (0) #define OPTBIT2(bit) (in6p->inp_flags2 & (bit) ? 1 : 0) +#define OPTSET2292_EXCLUSIVE(bit) \ +do { \ + INP_WLOCK(in6p); \ + if (OPTBIT(IN6P_RFC2292)) { \ + error = EINVAL; \ + } else { \ + if (optval) \ + in6p->inp_flags |= (bit); \ + else \ + in6p->inp_flags &= ~(bit); \ + } \ + INP_WUNLOCK(in6p); \ +} while (/*CONSTCOND*/ 0) case IPV6_RECVPKTINFO: - /* cannot mix with RFC2292 */ - if (OPTBIT(IN6P_RFC2292)) { - error = EINVAL; - break; - } - OPTSET(IN6P_PKTINFO); + OPTSET2292_EXCLUSIVE(IN6P_PKTINFO); break; case IPV6_HOPLIMIT: @@ -1633,48 +1644,23 @@ do { \ } case IPV6_RECVHOPLIMIT: - /* cannot mix with RFC2292 */ - if (OPTBIT(IN6P_RFC2292)) { - error = EINVAL; - break; - } - OPTSET(IN6P_HOPLIMIT); + OPTSET2292_EXCLUSIVE(IN6P_HOPLIMIT); break; case IPV6_RECVHOPOPTS: - /* cannot mix with RFC2292 */ - if (OPTBIT(IN6P_RFC2292)) { - error = EINVAL; - break; - } - OPTSET(IN6P_HOPOPTS); + OPTSET2292_EXCLUSIVE(IN6P_HOPOPTS); break; case IPV6_RECVDSTOPTS: - /* cannot mix with RFC2292 */ - if (OPTBIT(IN6P_RFC2292)) { - error = EINVAL; - break; - } - OPTSET(IN6P_DSTOPTS); + OPTSET2292_EXCLUSIVE(IN6P_DSTOPTS); break; case IPV6_RECVRTHDRDSTOPTS: - /* cannot mix with RFC2292 */ - if (OPTBIT(IN6P_RFC2292)) { - error = EINVAL; - break; - } - OPTSET(IN6P_RTHDRDSTOPTS); + OPTSET2292_EXCLUSIVE(IN6P_RTHDRDSTOPTS); break; case IPV6_RECVRTHDR: - /* cannot mix with RFC2292 */ - if (OPTBIT(IN6P_RFC2292)) { - error = EINVAL; - break; - } - OPTSET(IN6P_RTHDR); + OPTSET2292_EXCLUSIVE(IN6P_RTHDR); break; case IPV6_RECVPATHMTU: @@ -1717,11 +1703,7 @@ do { \ break; case IPV6_RECVTCLASS: /* cannot mix with RFC2292 XXX */ - if (OPTBIT(IN6P_RFC2292)) { - error = EINVAL; - break; - } - OPTSET(IN6P_TCLASS); + OPTSET2292_EXCLUSIVE(IN6P_TCLASS); break; case IPV6_AUTOFLOWLABEL: OPTSET(IN6P_AUTOFLOWLABEL); @@ -1741,8 +1723,10 @@ do { \ case IPV6_RSS_LISTEN_BUCKET: if ((optval >= 0) && (optval < rss_getnumbuckets())) { + INP_WLOCK(in6p); in6p->inp_rss_listen_bucket = optval; - OPTSET2(INP_RSS_BUCKET_SET, 1); + OPTSET2_N(INP_RSS_BUCKET_SET, 1); + INP_WUNLOCK(in6p); } else { error = EINVAL; }
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