@@ -820,6 +820,7 @@ enum {
IFLA_GTP_FD1,
IFLA_GTP_PDP_HASHSIZE,
IFLA_GTP_ROLE,
+ IFLA_GTP_RESTART_COUNT,
__IFLA_GTP_MAX,
};
#define IFLA_GTP_MAX (__IFLA_GTP_MAX - 1)
@@ -12,7 +12,7 @@ IPOBJ=ip.o ipaddress.o ipaddrlabel.o iproute.o iprule.o ipnetns.o \
iplink_geneve.o iplink_vrf.o iproute_lwtunnel.o ipmacsec.o ipila.o \
ipvrf.o iplink_xstats.o ipseg6.o iplink_netdevsim.o iplink_rmnet.o \
ipnexthop.o ipmptcp.o iplink_bareudp.o iplink_wwan.o ipioam6.o \
- iplink_amt.o
+ iplink_amt.o iplink_gtp.o
RTMONOBJ=rtmon.o
@@ -57,7 +57,7 @@ void iplink_types_usage(void)
" macsec | macvlan | macvtap |\n"
" netdevsim | nlmon | rmnet | sit | team | team_slave |\n"
" vcan | veth | vlan | vrf | vti | vxcan | vxlan | wwan |\n"
- " xfrm }\n");
+ " xfrm | gtp }\n");
}
void iplink_usage(void)
new file mode 100644
@@ -0,0 +1,123 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#include <stdio.h>
+
+#include "rt_names.h"
+#include "utils.h"
+#include "ip_common.h"
+
+#define GTP_ATTRSET(attrs, type) (((attrs) & (1L << (type))) != 0)
+
+static void print_explain(FILE *f)
+{
+ fprintf(f,
+ "Usage: ... gtp role ROLE\n"
+ " [ hsize HSIZE ]\n"
+ " [ restart_count RESTART_COUNT ]\n"
+ "\n"
+ "Where: ROLE := { sgsn | ggsn }\n"
+ " HSIZE := 1-131071\n"
+ " RESTART_COUNT := 0-255\n"
+ );
+}
+
+static void check_duparg(__u32 *attrs, int type, const char *key,
+ const char *argv)
+{
+ if (!GTP_ATTRSET(*attrs, type)) {
+ *attrs |= (1L << type);
+ return;
+ }
+ duparg2(key, argv);
+}
+
+static int gtp_parse_opt(struct link_util *lu, int argc, char **argv,
+ struct nlmsghdr *n)
+{
+ __u32 attrs = 0;
+
+ while (argc > 0) {
+ if (!strcmp(*argv, "role")) {
+ NEXT_ARG();
+ check_duparg(&attrs, IFLA_GTP_ROLE, "role", *argv);
+ if (!strcmp(*argv, "sgsn"))
+ addattr32(n, 1024, IFLA_GTP_ROLE, GTP_ROLE_SGSN);
+ else if (!strcmp(*argv, "ggsn"))
+ addattr32(n, 1024, IFLA_GTP_ROLE, GTP_ROLE_GGSN);
+ else
+ invarg("invalid role, use sgsn or ggsn", *argv);
+ } else if (!strcmp(*argv, "hsize")) {
+ __u32 hsize;
+
+ NEXT_ARG();
+ check_duparg(&attrs, IFLA_GTP_PDP_HASHSIZE, "hsize", *argv);
+
+ if (get_u32(&hsize, *argv, 0))
+ invarg("invalid PDP hash size", *argv);
+ if (hsize >= 1u << 17)
+ invarg("PDP hash size too big", *argv);
+ addattr32(n, 1024, IFLA_GTP_PDP_HASHSIZE, hsize);
+ } else if (!strcmp(*argv, "restart_count")) {
+ __u8 restart_count;
+
+ NEXT_ARG();
+ check_duparg(&attrs, IFLA_GTP_RESTART_COUNT, "restart_count", *argv);
+
+ if (get_u8(&restart_count, *argv, 10))
+ invarg("invalid restart_count", *argv);
+ addattr8(n, 1024, IFLA_GTP_RESTART_COUNT, restart_count);
+ } else if (!strcmp(*argv, "help")) {
+ print_explain(stderr);
+ return -1;
+ }
+ argc--, argv++;
+ }
+
+ if (!GTP_ATTRSET(attrs, IFLA_GTP_ROLE)) {
+ fprintf(stderr, "gtp: role of the gtp device was not specified\n");
+ return -1;
+ }
+
+ if (!GTP_ATTRSET(attrs, IFLA_GTP_PDP_HASHSIZE))
+ addattr32(n, 1024, IFLA_GTP_PDP_HASHSIZE, 1024);
+
+ return 0;
+}
+
+static void gtp_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
+{
+
+ if (tb[IFLA_GTP_ROLE]) {
+ __u32 role = rta_getattr_u32(tb[IFLA_GTP_ROLE]);
+
+ print_string(PRINT_ANY, "role", "role %s ",
+ role == GTP_ROLE_SGSN ? "sgsn" : "ggsn");
+ }
+
+ if (tb[IFLA_GTP_PDP_HASHSIZE]) {
+ __u32 hsize = rta_getattr_u32(tb[IFLA_GTP_PDP_HASHSIZE]);
+
+ print_uint(PRINT_ANY, "hsize", "hsize %u ", hsize);
+ }
+
+ if (tb[IFLA_GTP_RESTART_COUNT]) {
+ __u8 restart_count = rta_getattr_u8(tb[IFLA_GTP_RESTART_COUNT]);
+
+ print_uint(PRINT_ANY, "restart_count",
+ "restart_count %u ", restart_count);
+ }
+}
+
+static void gtp_print_help(struct link_util *lu, int argc, char **argv,
+ FILE *f)
+{
+ print_explain(f);
+}
+
+struct link_util gtp_link_util = {
+ .id = "gtp",
+ .maxattr = IFLA_GTP_MAX,
+ .parse_opt = gtp_parse_opt,
+ .print_opt = gtp_print_opt,
+ .print_help = gtp_print_help,
+};
@@ -233,7 +233,8 @@ ip-link \- network device configuration
.BR macsec " |"
.BR netdevsim " |"
.BR rmnet " |"
-.BR xfrm " ]"
+.BR xfrm " |"
+.BR gtp " ]"
.ti -8
.IR ETYPE " := [ " TYPE " |"
@@ -382,6 +383,9 @@ Link types:
.sp
.BR xfrm
- Virtual xfrm interface
+.sp
+.BR gtp
+- GPRS Tunneling Protocol
.in -8
.TP
@@ -1926,6 +1930,29 @@ policies. Policies must be configured with the same key. If not set, the key def
.in -8
+.TP
+GTP Type Support
+For a link of type
+.I GTP
+the following additional arguments are supported:
+
+.BI "ip link add " DEVICE " type gtp role " ROLE " hsize " HSIZE
+
+.in +8
+.sp
+.BI role " ROLE "
+- specifies the role of the GTP device, either sgsn or ggsn
+
+.sp
+.BI hsize " HSIZE "
+- specifies size of the hashtable which stores PDP contexts
+
+.sp
+.BI restart_count " RESTART_COUNT "
+- GTP instance restart counter
+
+.in -8
+
.SS ip link delete - delete virtual link
.TP
Support for creating GTP devices through ip link. Two arguments can be specified by the user when adding device of the GTP type. - role (sgsn or ggsn) - indicates whether we are on the GGSN or SGSN - hsize - indicates the size of the hash table where PDP sessions are stored IFLA_GTP_FD0 and IFLA_GTP_FD1 arguments would not be provided. Those are file descriptores to the sockets created in the userspace. Since we are not going to create sockets in ip link, we don't have to provide them. Signed-off-by: Wojciech Drewek <wojciech.drewek@intel.com> --- v2: use SPDX tag, use strcmp() instead of matches(), parse IFLA_GTP_RESTART_COUNT arg --- include/uapi/linux/if_link.h | 1 + ip/Makefile | 2 +- ip/iplink.c | 2 +- ip/iplink_gtp.c | 123 +++++++++++++++++++++++++++++++++++ man/man8/ip-link.8.in | 29 ++++++++- 5 files changed, 154 insertions(+), 3 deletions(-) create mode 100644 ip/iplink_gtp.c