mirror of
https://git.kernel.org/pub/scm/network/iproute2/iproute2.git
synced 2024-11-15 14:05:22 +08:00
08e6ee96b5
Support the "dsa" kind of rtnl_link_ops exported by the kernel, and
export reads/writes to IFLA_DSA_MASTER.
Examples:
$ ip link set swp0 type dsa conduit eth1
$ ip -d link show dev swp0
(...)
dsa conduit eth0
$ ip -d -j link show swp0
[
{
"link": "eth1",
"linkinfo": {
"info_kind": "dsa",
"info_data": {
"conduit": "eth1"
}
},
}
]
Note that by construction and as shown in the example, the IFLA_LINK
reported by a DSA user port is identical to what is reported through
IFLA_DSA_MASTER. However IFLA_LINK is not writable, and overloading its
meaning to make it writable would clash with other users of IFLA_LINK
(vlan etc) for which writing this property does not make sense.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David Ahern <dsahern@kernel.org>
69 lines
1.4 KiB
C
69 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* iplink_dsa.c DSA switch support
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*/
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#include "utils.h"
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#include "ip_common.h"
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static void print_usage(FILE *f)
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{
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fprintf(f, "Usage: ... dsa [ conduit DEVICE ]\n");
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}
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static int dsa_parse_opt(struct link_util *lu, int argc, char **argv,
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struct nlmsghdr *n)
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{
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while (argc > 0) {
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if (strcmp(*argv, "conduit") == 0 ||
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strcmp(*argv, "master") == 0) {
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__u32 ifindex;
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NEXT_ARG();
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ifindex = ll_name_to_index(*argv);
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if (!ifindex)
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invarg("Device does not exist\n", *argv);
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addattr_l(n, 1024, IFLA_DSA_MASTER, &ifindex, 4);
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} else if (strcmp(*argv, "help") == 0) {
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print_usage(stderr);
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return -1;
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} else {
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fprintf(stderr, "dsa: unknown command \"%s\"?\n", *argv);
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print_usage(stderr);
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return -1;
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}
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argc--;
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argv++;
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}
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return 0;
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}
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static void dsa_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
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{
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if (!tb)
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return;
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if (tb[IFLA_DSA_MASTER]) {
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__u32 conduit = rta_getattr_u32(tb[IFLA_DSA_MASTER]);
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print_string(PRINT_ANY,
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"conduit", "conduit %s ",
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ll_index_to_name(conduit));
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}
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}
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static void dsa_print_help(struct link_util *lu, int argc, char **argv,
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FILE *f)
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{
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print_usage(f);
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}
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struct link_util dsa_link_util = {
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.id = "dsa",
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.maxattr = IFLA_DSA_MAX,
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.parse_opt = dsa_parse_opt,
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.print_opt = dsa_print_opt,
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.print_help = dsa_print_help,
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};
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