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SUSE:SLE-12-SP1:Update
iproute2
ip-route-add-congestion-control-metric.patch
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File ip-route-add-congestion-control-metric.patch of Package iproute2
From: Daniel Borkmann <dborkman@redhat.com> Date: Fri, 9 Jan 2015 00:13:06 +0100 Subject: ip: route: add congestion control metric Patch-mainline: v4.0.0 Git-commit: 6ef87f9cce213cae66098d08e0abc36d67b95244 References: fate#318553 This patch adds configuration and dumping of congestion control metric for ip route, for example: ip route add <dst> dev foo congctl [lock] dctcp SLE12-SP1: removed misleading "(3.20+ only)" from man page Reference: http://thread.gmane.org/gmane.linux.network/344733 Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Acked-by: Michal Kubecek <mkubecek@suse.cz> --- ip/iproute.c | 21 ++++++++++++++++++--- man/man8/ip-route.8.in | 19 ++++++++++++++++++- 2 files changed, 36 insertions(+), 4 deletions(-) diff --git a/ip/iproute.c b/ip/iproute.c index 25a56d1f5f12..21071b35bcdd 100644 --- a/ip/iproute.c +++ b/ip/iproute.c @@ -53,6 +53,7 @@ static const char *mx_names[RTAX_MAX+1] = { [RTAX_RTO_MIN] = "rto_min", [RTAX_INITRWND] = "initrwnd", [RTAX_QUICKACK] = "quickack", + [RTAX_CC_ALGO] = "congctl", }; static void usage(void) __attribute__((noreturn)); @@ -80,7 +81,7 @@ static void usage(void) fprintf(stderr, " [ window NUMBER] [ cwnd NUMBER ] [ initcwnd NUMBER ]\n"); fprintf(stderr, " [ ssthresh NUMBER ] [ realms REALM ] [ src ADDRESS ]\n"); fprintf(stderr, " [ rto_min TIME ] [ hoplimit NUMBER ] [ initrwnd NUMBER ]\n"); - fprintf(stderr, " [ quickack BOOL ]\n"); + fprintf(stderr, " [ quickack BOOL ] [ congctl NAME ]\n"); fprintf(stderr, "TYPE := [ unicast | local | broadcast | multicast | throw |\n"); fprintf(stderr, " unreachable | prohibit | blackhole | nat ]\n"); fprintf(stderr, "TABLE_ID := [ local | main | default | all | NUMBER ]\n"); @@ -524,7 +525,7 @@ int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg) mxlock = *(unsigned*)RTA_DATA(mxrta[RTAX_LOCK]); for (i=2; i<= RTAX_MAX; i++) { - unsigned val; + __u32 val; if (mxrta[i] == NULL) continue; @@ -533,10 +534,12 @@ int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg) fprintf(fp, " %s", mx_names[i]); else fprintf(fp, " metric %d", i); + if (mxlock & (1<<i)) fprintf(fp, " lock"); + if (i != RTAX_CC_ALGO) + val = rta_getattr_u32(mxrta[i]); - val = *(unsigned*)RTA_DATA(mxrta[i]); switch (i) { case RTAX_HOPLIMIT: if ((int)val == -1) @@ -558,6 +561,10 @@ int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg) fprintf(fp, " %gs", val/1e3); else fprintf(fp, " %ums", val); + break; + case RTAX_CC_ALGO: + fprintf(fp, " %s", rta_getattr_str(mxrta[i])); + break; } } } @@ -896,6 +903,14 @@ static int iproute_modify(int cmd, unsigned flags, int argc, char **argv) if (quickack != 1 && quickack != 0) invarg("\"quickack\" value should be 0 or 1\n", *argv); rta_addattr32(mxrta, sizeof(mxbuf), RTAX_QUICKACK, quickack); + } else if (matches(*argv, "congctl") == 0) { + NEXT_ARG(); + if (strcmp(*argv, "lock") == 0) { + mxlock |= 1 << RTAX_CC_ALGO; + NEXT_ARG(); + } + rta_addattr_l(mxrta, sizeof(mxbuf), RTAX_CC_ALGO, *argv, + strlen(*argv)); } else if (matches(*argv, "rttvar") == 0) { unsigned win; NEXT_ARG(); diff --git a/man/man8/ip-route.8.in b/man/man8/ip-route.8.in index 79bc7f108544..139f7f6bbac1 100644 --- a/man/man8/ip-route.8.in +++ b/man/man8/ip-route.8.in @@ -114,7 +114,9 @@ replace " } " .B initrwnd .IR NUMBER " ] [ " .B quickack -.IR BOOL " ]" +.IR BOOL " ] [ " +.B congctl +.IR NAME " ]" .ti -8 .IR TYPE " := [ " @@ -415,6 +417,21 @@ The default value is zero, meaning to use Slow Start value. Enable or disable quick ack for connections to this destination. .TP +.BI congctl " NAME " +.TP +.BI "congctl lock" " NAME " +Sets a specific TCP congestion control algorithm only for a given destination. +If not specified, Linux keeps the current global default TCP congestion control +algorithm, or the one set from the application. If the modifier +.B lock +is not used, an application may nevertheless overwrite the suggested congestion +control algorithm for that destination. If the modifier +.B lock +is used, then an application is not allowed to overwrite the specified congestion +control algorithm for that destination, thus it will be enforced/guaranteed to +use the proposed algorithm. + +.TP .BI advmss " NUMBER " "(2.3.15+ only)" the MSS ('Maximal Segment Size') to advertise to these destinations when establishing TCP connections. If it is not given, -- 2.4.4
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