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Tue, 16 Mar 2021 10:21:18 +0000 Received: from localhost.localdomain (172.20.145.6) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 16 Mar 2021 10:21:11 +0000 From: Petr Machata To: , , CC: Ido Schimmel , Petr Machata Subject: [PATCH iproute2-next v3 5/6] nexthop: Add support for resilient nexthop groups Date: Tue, 16 Mar 2021 11:20:15 +0100 Message-ID: <83ce7aeb23b79b0003046ccf59ab90367ab4cd9e.1615889875.git.petrm@nvidia.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: References: MIME-Version: 1.0 X-Originating-IP: [172.20.145.6] X-ClientProxiedBy: HQMAIL105.nvidia.com (172.20.187.12) To HQMAIL107.nvidia.com (172.20.187.13) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: f7eaa5af-f21b-45ce-e045-08d8e8653d09 X-MS-TrafficTypeDiagnostic: DM5PR1201MB2505: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:7691; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.112.34; CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:mail.nvidia.com; PTR:schybrid03.nvidia.com; CAT:NONE; SFS:(4636009)(396003)(376002)(136003)(346002)(39860400002)(46966006)(36840700001)(54906003)(2616005)(86362001)(186003)(34020700004)(36906005)(8936002)(8676002)(82310400003)(426003)(2906002)(16526019)(36860700001)(478600001)(5660300002)(4326008)(7636003)(36756003)(110136005)(83380400001)(70586007)(336012)(107886003)(70206006)(356005)(316002)(47076005)(82740400003)(26005); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Mar 2021 10:21:18.4764 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: f7eaa5af-f21b-45ce-e045-08d8e8653d09 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[216.228.112.34]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT066.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR1201MB2505 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Ido Schimmel Add ability to configure resilient nexthop groups and show their current configuration. Example: # ip nexthop add id 10 group 1/2 type resilient buckets 8 # ip nexthop show id 10 id 10 group 1/2 type resilient buckets 8 idle_timer 120 unbalanced_timer 0 # ip -j -p nexthop show id 10 [ { "id": 10, "group": [ { "id": 1 },{ "id": 2 } ], "type": "resilient", "resilient_args": { "buckets": 8, "idle_timer": 120, "unbalanced_timer": 0 }, "flags": [ ] } ] Signed-off-by: Ido Schimmel Signed-off-by: Petr Machata --- ip/ipnexthop.c | 144 +++++++++++++++++++++++++++++++++++++++++- man/man8/ip-nexthop.8 | 55 +++++++++++++++- 2 files changed, 193 insertions(+), 6 deletions(-) diff --git a/ip/ipnexthop.c b/ip/ipnexthop.c index 5aae32629edd..1d50bf7529c4 100644 --- a/ip/ipnexthop.c +++ b/ip/ipnexthop.c @@ -43,9 +43,12 @@ static void usage(void) " [ groups ] [ fdb ]\n" "NH := { blackhole | [ via ADDRESS ] [ dev DEV ] [ onlink ]\n" " [ encap ENCAPTYPE ENCAPHDR ] |\n" - " group GROUP [ fdb ] [ type TYPE ] }\n" + " group GROUP [ fdb ] [ type TYPE [ TYPE_ARGS ] ] }\n" "GROUP := [ //... ]\n" - "TYPE := { mpath }\n" + "TYPE := { mpath | resilient }\n" + "TYPE_ARGS := [ RESILIENT_ARGS ]\n" + "RESILIENT_ARGS := [ buckets BUCKETS ] [ idle_timer IDLE ]\n" + " [ unbalanced_timer UNBALANCED ]\n" "ENCAPTYPE := [ mpls ]\n" "ENCAPHDR := [ MPLSLABEL ]\n"); exit(-1); @@ -203,6 +206,66 @@ static void print_nh_group(FILE *fp, const struct rtattr *grps_attr) close_json_array(PRINT_JSON, NULL); } +static const char *nh_group_type_name(__u16 type) +{ + switch (type) { + case NEXTHOP_GRP_TYPE_MPATH: + return "mpath"; + case NEXTHOP_GRP_TYPE_RES: + return "resilient"; + default: + return ""; + } +} + +static void print_nh_group_type(FILE *fp, const struct rtattr *grp_type_attr) +{ + __u16 type = rta_getattr_u16(grp_type_attr); + + if (type == NEXTHOP_GRP_TYPE_MPATH) + /* Do not print type in order not to break existing output. */ + return; + + print_string(PRINT_ANY, "type", "type %s ", nh_group_type_name(type)); +} + +static void print_nh_res_group(FILE *fp, const struct rtattr *res_grp_attr) +{ + struct rtattr *tb[NHA_RES_GROUP_MAX + 1]; + struct rtattr *rta; + struct timeval tv; + + parse_rtattr_nested(tb, NHA_RES_GROUP_MAX, res_grp_attr); + + open_json_object("resilient_args"); + + if (tb[NHA_RES_GROUP_BUCKETS]) + print_uint(PRINT_ANY, "buckets", "buckets %u ", + rta_getattr_u16(tb[NHA_RES_GROUP_BUCKETS])); + + if (tb[NHA_RES_GROUP_IDLE_TIMER]) { + rta = tb[NHA_RES_GROUP_IDLE_TIMER]; + __jiffies_to_tv(&tv, rta_getattr_u32(rta)); + print_tv(PRINT_ANY, "idle_timer", "idle_timer %g ", &tv); + } + + if (tb[NHA_RES_GROUP_UNBALANCED_TIMER]) { + rta = tb[NHA_RES_GROUP_UNBALANCED_TIMER]; + __jiffies_to_tv(&tv, rta_getattr_u32(rta)); + print_tv(PRINT_ANY, "unbalanced_timer", "unbalanced_timer %g ", + &tv); + } + + if (tb[NHA_RES_GROUP_UNBALANCED_TIME]) { + rta = tb[NHA_RES_GROUP_UNBALANCED_TIME]; + __jiffies_to_tv(&tv, rta_getattr_u32(rta)); + print_tv(PRINT_ANY, "unbalanced_time", "unbalanced_time %g ", + &tv); + } + + close_json_object(); +} + int print_nexthop(struct nlmsghdr *n, void *arg) { struct nhmsg *nhm = NLMSG_DATA(n); @@ -229,7 +292,7 @@ int print_nexthop(struct nlmsghdr *n, void *arg) if (filter.proto && filter.proto != nhm->nh_protocol) return 0; - parse_rtattr(tb, NHA_MAX, RTM_NHA(nhm), len); + parse_rtattr_flags(tb, NHA_MAX, RTM_NHA(nhm), len, NLA_F_NESTED); open_json_object(NULL); @@ -243,6 +306,12 @@ int print_nexthop(struct nlmsghdr *n, void *arg) if (tb[NHA_GROUP]) print_nh_group(fp, tb[NHA_GROUP]); + if (tb[NHA_GROUP_TYPE]) + print_nh_group_type(fp, tb[NHA_GROUP_TYPE]); + + if (tb[NHA_RES_GROUP]) + print_nh_res_group(fp, tb[NHA_RES_GROUP]); + if (tb[NHA_ENCAP]) lwt_print_encap(fp, tb[NHA_ENCAP_TYPE], tb[NHA_ENCAP]); @@ -333,10 +402,70 @@ static int read_nh_group_type(const char *name) { if (strcmp(name, "mpath") == 0) return NEXTHOP_GRP_TYPE_MPATH; + else if (strcmp(name, "resilient") == 0) + return NEXTHOP_GRP_TYPE_RES; return __NEXTHOP_GRP_TYPE_MAX; } +static void parse_nh_group_type_res(struct nlmsghdr *n, int maxlen, int *argcp, + char ***argvp) +{ + char **argv = *argvp; + struct rtattr *nest; + int argc = *argcp; + + if (!NEXT_ARG_OK()) + return; + + nest = addattr_nest(n, maxlen, NHA_RES_GROUP); + nest->rta_type |= NLA_F_NESTED; + + NEXT_ARG_FWD(); + while (argc > 0) { + if (strcmp(*argv, "buckets") == 0) { + __u16 buckets; + + NEXT_ARG(); + if (get_u16(&buckets, *argv, 0)) + invarg("invalid buckets value", *argv); + + addattr16(n, maxlen, NHA_RES_GROUP_BUCKETS, buckets); + } else if (strcmp(*argv, "idle_timer") == 0) { + __u32 idle_timer; + + NEXT_ARG(); + if (get_unsigned(&idle_timer, *argv, 0) || + idle_timer >= ~0UL / 100) + invarg("invalid idle timer value", *argv); + + addattr32(n, maxlen, NHA_RES_GROUP_IDLE_TIMER, + idle_timer * 100); + } else if (strcmp(*argv, "unbalanced_timer") == 0) { + __u32 unbalanced_timer; + + NEXT_ARG(); + if (get_unsigned(&unbalanced_timer, *argv, 0) || + unbalanced_timer >= ~0UL / 100) + invarg("invalid unbalanced timer value", *argv); + + addattr32(n, maxlen, NHA_RES_GROUP_UNBALANCED_TIMER, + unbalanced_timer * 100); + } else { + break; + } + argc--; argv++; + } + + /* argv is currently the first unparsed argument, but ipnh_modify() + * will move to the next, so step back. + */ + *argcp = argc + 1; + *argvp = argv - 1; + + addattr_nest_end(n, nest); +} + static void parse_nh_group_type(struct nlmsghdr *n, int maxlen, int *argcp, char ***argvp) { @@ -349,6 +478,15 @@ static void parse_nh_group_type(struct nlmsghdr *n, int maxlen, int *argcp, if (type > NEXTHOP_GRP_TYPE_MAX) invarg("\"type\" value is invalid\n", *argv); + switch (type) { + case NEXTHOP_GRP_TYPE_MPATH: + /* No additional arguments */ + break; + case NEXTHOP_GRP_TYPE_RES: + parse_nh_group_type_res(n, maxlen, &argc, &argv); + break; + } + *argcp = argc; *argvp = argv; diff --git a/man/man8/ip-nexthop.8 b/man/man8/ip-nexthop.8 index b86f307fef35..c1ac130c2a2f 100644 --- a/man/man8/ip-nexthop.8 +++ b/man/man8/ip-nexthop.8 @@ -56,7 +56,7 @@ ip-nexthop \- nexthop object management .IR GROUP " [ " .BR fdb " ] [ " .B type -.IR TYPE " ] } " +.IR TYPE " [ " TYPE_ARGS " ] ] }" .ti -8 .IR ENCAP " := [ " @@ -75,7 +75,20 @@ ip-nexthop \- nexthop object management .ti -8 .IR TYPE " := { " -.BR mpath " }" +.BR mpath " | " resilient " }" + +.ti -8 +.IR TYPE_ARGS " := [ " +.IR RESILIENT_ARGS " ] " + +.ti -8 +.IR RESILIENT_ARGS " := " +.RB "[ " buckets +.IR BUCKETS " ] [ " +.B idle_timer +.IR IDLE " ] [ " +.B unbalanced_timer +.IR UNBALANCED " ]" .SH DESCRIPTION .B ip nexthop @@ -128,7 +141,7 @@ is a set of encapsulation attributes specific to the .in -2 .TP -.BI group " GROUP [ " type " TYPE ]" +.BI group " GROUP [ " type " TYPE [ TYPE_ARGS ] ]" create a nexthop group. Group specification is id with an optional weight (id,weight) and a '/' as a separator between entries. .sp @@ -139,6 +152,37 @@ is a string specifying the nexthop group type. Namely: .BI mpath - Multipath nexthop group backed by the hash-threshold algorithm. The default when the type is unspecified. +.sp +.BI resilient +- Resilient nexthop group. Group is resilient to addition and deletion of +nexthops. + +.sp +.in -8 +.I TYPE_ARGS +is a set of attributes specific to the +.I TYPE. + +.in +8 +.B resilient +.in +2 +.B buckets +.I BUCKETS +- Number of nexthop buckets. Cannot be changed for an existing group +.sp + +.B idle_timer +.I IDLE +- Time in seconds in which a nexthop bucket does not see traffic and is +therefore considered idle. Default is 120 seconds + +.B unbalanced_timer +.I UNBALANCED +- Time in seconds in which a nexthop group is unbalanced and is therefore +considered unbalanced. The kernel will try to rebalance unbalanced groups, which +might result in some flows being reset. A value of 0 means that no +rebalancing will take place. Default is 0 seconds +.in -2 .TP .B blackhole @@ -225,6 +269,11 @@ ip nexthop add id 7 group 5/6 fdb Adds a fdb nexthop group with id 7. A fdb nexthop group can only have fdb nexthops. .RE +.PP +ip nexthop add id 10 group 1/2 type resilient buckets 32 +.RS 4 +Add a resilient nexthop group with id 10 and 32 nexthop buckets. +.RE .SH SEE ALSO .br .BR ip (8)