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Message-ID: <1382466229-15123-3-git-send-email-f.fainelli@gmail.com>
Date: Tue, 22 Oct 2013 11:23:47 -0700
From: "Florian Fainelli" <f.fainelli@...il.com>
To: netdev@...r.kernel.org
cc: davem@...emloft.net, s.hauer@...gutronix.de, nbd@...nwrt.org,
blogic@...nwrt.org, jogo@...nwrt.org, gary@...assoc.com,
"Florian Fainelli" <f.fainelli@...il.com>
Subject: [PATCH 2/4 net-next] tools: add Generic Netlink switch
configuration tool
Add the user-space configuration tool for the Generic Netlink switch
configuration API. This tool is currently linking with libnl-1 and uses
pkg-config to discover the netlink library to use.
Signed-off-by: Felix Fietkau <nbd@...nwrt.org>
Signed-off-by: John Crispin <blogic@...nwrt.org>
Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
---
MAINTAINERS | 1 +
tools/Makefile | 10 +-
tools/swconfig/.gitignore | 2 +
tools/swconfig/Makefile | 15 +
tools/swconfig/cli.c | 328 +++++++++++++++++++
tools/swconfig/swlib.c | 786 ++++++++++++++++++++++++++++++++++++++++++++++
tools/swconfig/swlib.h | 244 ++++++++++++++
7 files changed, 1385 insertions(+), 1 deletion(-)
create mode 100644 tools/swconfig/.gitignore
create mode 100644 tools/swconfig/Makefile
create mode 100644 tools/swconfig/cli.c
create mode 100644 tools/swconfig/swlib.c
create mode 100644 tools/swconfig/swlib.h
diff --git a/MAINTAINERS b/MAINTAINERS
index 3a54262..bdd5b0f 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8126,6 +8126,7 @@ F: drivers/net/ethernet/phy/swconfig*.c
F: include/uapi/linux/switch.h
F: include/linux/switch.h
F: Documentation/networking/swconfig.txt
+F: tools/swconfig/
SYNOPSYS ARC ARCHITECTURE
M: Vineet Gupta <vgupta@...opsys.com>
diff --git a/tools/Makefile b/tools/Makefile
index 41067f3..2dbb2695 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -15,6 +15,7 @@ help:
@echo ' net - misc networking tools'
@echo ' vm - misc vm tools'
@echo ' x86_energy_perf_policy - Intel energy policy tool'
+ @echo ' swconfig - netlink switch configuration tool'
@echo ''
@echo 'You can do:'
@echo ' $$ make -C tools/ <tool>_install'
@@ -50,6 +51,9 @@ selftests: FORCE
turbostat x86_energy_perf_policy: FORCE
$(call descend,power/x86/$@)
+swconfig: FORCE
+ $(call descend,swconfig)
+
cpupower_install:
$(call descend,power/$(@:_install=),install)
@@ -84,8 +88,12 @@ selftests_clean:
turbostat_clean x86_energy_perf_policy_clean:
$(call descend,power/x86/$(@:_clean=),clean)
+swconfig_clean:
+ $(call descend,swconfig,clean)
+
clean: cgroup_clean cpupower_clean firewire_clean lguest_clean perf_clean \
selftests_clean turbostat_clean usb_clean virtio_clean \
- vm_clean net_clean x86_energy_perf_policy_clean
+ vm_clean net_clean x86_energy_perf_policy_clean \
+ swconfig_clean
.PHONY: FORCE
diff --git a/tools/swconfig/.gitignore b/tools/swconfig/.gitignore
new file mode 100644
index 0000000..b23b79b
--- /dev/null
+++ b/tools/swconfig/.gitignore
@@ -0,0 +1,2 @@
+/swconfig
+/*.o
diff --git a/tools/swconfig/Makefile b/tools/swconfig/Makefile
new file mode 100644
index 0000000..96158678
--- /dev/null
+++ b/tools/swconfig/Makefile
@@ -0,0 +1,15 @@
+ifndef CFLAGS
+CFLAGS = -O2 -g -D_GNU_SOURCE $(shell pkg-config --cflags libnl-1)
+endif
+LIBS=$(shell pkg-config --libs libnl-1)
+
+all: swconfig
+
+%.o: %.c
+ $(CC) $(CFLAGS) -c -o $@ $^
+
+swconfig: cli.o swlib.o
+ $(CC) $(LDFLAGS) -o $@ $^ $(LIBS)
+
+clean:
+ -rm *.o swconfig
diff --git a/tools/swconfig/cli.c b/tools/swconfig/cli.c
new file mode 100644
index 0000000..9752c95
--- /dev/null
+++ b/tools/swconfig/cli.c
@@ -0,0 +1,328 @@
+/*
+ * swconfig.c: Switch configuration utility
+ *
+ * Copyright (C) 2008 Felix Fietkau <nbd@...nwrt.org>
+ * Copyright (C) 2010 Martin Mares <mj@....cz>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundatio.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <stdint.h>
+#include <getopt.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include <linux/types.h>
+#include <linux/netlink.h>
+#include <linux/genetlink.h>
+#include <netlink/netlink.h>
+#include <netlink/genl/genl.h>
+#include <netlink/genl/ctrl.h>
+#include "../../include/uapi/linux/swconfig.h"
+#include "swlib.h"
+
+enum {
+ CMD_NONE,
+ CMD_GET,
+ CMD_SET,
+ CMD_LOAD,
+ CMD_HELP,
+ CMD_SHOW,
+ CMD_PORTMAP,
+};
+
+static void
+print_attrs(const struct switch_attr *attr)
+{
+ int i = 0;
+ while (attr) {
+ const char *type;
+ switch(attr->type) {
+ case SWITCH_TYPE_INT:
+ type = "int";
+ break;
+ case SWITCH_TYPE_STRING:
+ type = "string";
+ break;
+ case SWITCH_TYPE_PORTS:
+ type = "ports";
+ break;
+ case SWITCH_TYPE_NOVAL:
+ type = "none";
+ break;
+ default:
+ type = "unknown";
+ break;
+ }
+ printf("\tAttribute %d (%s): %s (%s)\n", ++i, type, attr->name, attr->description);
+ attr = attr->next;
+ }
+}
+
+static void
+list_attributes(struct switch_dev *dev)
+{
+ printf("%s: %s(%s), ports: %d (cpu @ %d), vlans: %d\n", dev->dev_name, dev->alias, dev->name, dev->ports, dev->cpu_port, dev->vlans);
+ printf(" --switch\n");
+ print_attrs(dev->ops);
+ printf(" --vlan\n");
+ print_attrs(dev->vlan_ops);
+ printf(" --port\n");
+ print_attrs(dev->port_ops);
+}
+
+static void
+print_attr_val(const struct switch_attr *attr, const struct switch_val *val)
+{
+ int i;
+
+ switch (attr->type) {
+ case SWITCH_TYPE_INT:
+ printf("%d", val->value.i);
+ break;
+ case SWITCH_TYPE_STRING:
+ printf("%s", val->value.s);
+ break;
+ case SWITCH_TYPE_PORTS:
+ for(i = 0; i < val->len; i++) {
+ printf("%d%s ",
+ val->value.ports[i].id,
+ (val->value.ports[i].flags &
+ SWLIB_PORT_FLAG_TAGGED) ? "t" : "");
+ }
+ break;
+ default:
+ printf("?unknown-type?");
+ }
+}
+
+static void
+show_attrs(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val)
+{
+ while (attr) {
+ if (attr->type != SWITCH_TYPE_NOVAL) {
+ printf("\t%s: ", attr->name);
+ if (swlib_get_attr(dev, attr, val) < 0)
+ printf("???");
+ else
+ print_attr_val(attr, val);
+ putchar('\n');
+ }
+ attr = attr->next;
+ }
+}
+
+static void
+show_global(struct switch_dev *dev)
+{
+ struct switch_val val;
+
+ printf("Global attributes:\n");
+ show_attrs(dev, dev->ops, &val);
+}
+
+static void
+show_port(struct switch_dev *dev, int port)
+{
+ struct switch_val val;
+
+ printf("Port %d:\n", port);
+ val.port_vlan = port;
+ show_attrs(dev, dev->port_ops, &val);
+}
+
+static void
+show_vlan(struct switch_dev *dev, int vlan, bool all)
+{
+ struct switch_val val;
+ struct switch_attr *attr;
+
+ val.port_vlan = vlan;
+
+ if (all) {
+ attr = swlib_lookup_attr(dev, SWLIB_ATTR_GROUP_VLAN, "ports");
+ if (swlib_get_attr(dev, attr, &val) < 0)
+ return;
+
+ if (!val.len)
+ return;
+ }
+
+ printf("VLAN %d:\n", vlan);
+ show_attrs(dev, dev->vlan_ops, &val);
+}
+
+static void
+print_usage(void)
+{
+ printf("swconfig list\n");
+ printf("swconfig dev <dev> [port <port>|vlan <vlan>] (help|set <key> <value>|get <key>|load <config>|show)\n");
+ exit(1);
+}
+
+int main(int argc, char **argv)
+{
+ int retval = 0;
+ struct switch_dev *dev;
+ struct switch_attr *a;
+ struct switch_val val;
+ int err;
+ int i;
+
+ int cmd = CMD_NONE;
+ char *cdev = NULL;
+ int cport = -1;
+ int cvlan = -1;
+ char *ckey = NULL;
+ char *cvalue = NULL;
+ char *csegment = NULL;
+
+ if((argc == 2) && !strcmp(argv[1], "list")) {
+ swlib_list();
+ return 0;
+ }
+
+ if(argc < 4)
+ print_usage();
+
+ if(strcmp(argv[1], "dev"))
+ print_usage();
+
+ cdev = argv[2];
+
+ for(i = 3; i < argc; i++)
+ {
+ char *arg = argv[i];
+ if (cmd != CMD_NONE) {
+ print_usage();
+ } else if (!strcmp(arg, "port") && i+1 < argc) {
+ cport = atoi(argv[++i]);
+ } else if (!strcmp(arg, "vlan") && i+1 < argc) {
+ cvlan = atoi(argv[++i]);
+ } else if (!strcmp(arg, "help")) {
+ cmd = CMD_HELP;
+ } else if (!strcmp(arg, "set") && i+1 < argc) {
+ cmd = CMD_SET;
+ ckey = argv[++i];
+ if (i+1 < argc)
+ cvalue = argv[++i];
+ } else if (!strcmp(arg, "get") && i+1 < argc) {
+ cmd = CMD_GET;
+ ckey = argv[++i];
+ } else if (!strcmp(arg, "load") && i+1 < argc) {
+ if ((cport >= 0) || (cvlan >= 0))
+ print_usage();
+ cmd = CMD_LOAD;
+ ckey = argv[++i];
+ } else if (!strcmp(arg, "portmap")) {
+ if (i + 1 < argc)
+ csegment = argv[++i];
+ cmd = CMD_PORTMAP;
+ } else if (!strcmp(arg, "show")) {
+ cmd = CMD_SHOW;
+ } else {
+ print_usage();
+ }
+ }
+
+ if (cmd == CMD_NONE)
+ print_usage();
+ if (cport > -1 && cvlan > -1)
+ print_usage();
+
+ dev = swlib_connect(cdev);
+ if (!dev) {
+ fprintf(stderr, "Failed to connect to the switch\n");
+ return 1;
+ }
+
+ swlib_scan(dev);
+
+ if (cmd == CMD_GET || cmd == CMD_SET) {
+ if(cport > -1)
+ a = swlib_lookup_attr(dev, SWLIB_ATTR_GROUP_PORT, ckey);
+ else if(cvlan > -1)
+ a = swlib_lookup_attr(dev, SWLIB_ATTR_GROUP_VLAN, ckey);
+ else
+ a = swlib_lookup_attr(dev, SWLIB_ATTR_GROUP_GLOBAL, ckey);
+
+ if(!a)
+ {
+ fprintf(stderr, "Unknown attribute \"%s\"\n", ckey);
+ goto out;
+ }
+ }
+
+ switch(cmd)
+ {
+ case CMD_SET:
+ if ((a->type != SWITCH_TYPE_NOVAL) &&
+ (cvalue == NULL))
+ print_usage();
+
+ if(cvlan > -1)
+ cport = cvlan;
+
+ if(swlib_set_attr_string(dev, a, cport, cvalue) < 0)
+ {
+ fprintf(stderr, "failed\n");
+ retval = -1;
+ goto out;
+ }
+ break;
+ case CMD_GET:
+ if(cvlan > -1)
+ val.port_vlan = cvlan;
+ if(cport > -1)
+ val.port_vlan = cport;
+ if(swlib_get_attr(dev, a, &val) < 0)
+ {
+ fprintf(stderr, "failed\n");
+ retval = -1;
+ goto out;
+ }
+ print_attr_val(a, &val);
+ putchar('\n');
+ break;
+ case CMD_LOAD:
+ fprintf(stderr, "load command not supported\n");
+ break;
+ case CMD_HELP:
+ list_attributes(dev);
+ break;
+ case CMD_PORTMAP:
+ swlib_print_portmap(dev, csegment);
+ break;
+ case CMD_SHOW:
+ if (cport >= 0 || cvlan >= 0) {
+ if (cport >= 0)
+ show_port(dev, cport);
+ else
+ show_vlan(dev, cvlan, false);
+ } else {
+ show_global(dev);
+ for (i=0; i < dev->ports; i++)
+ show_port(dev, i);
+ for (i=0; i < dev->vlans; i++)
+ show_vlan(dev, i, true);
+ }
+ break;
+ }
+
+out:
+ swlib_free_all(dev);
+ return 0;
+}
diff --git a/tools/swconfig/swlib.c b/tools/swconfig/swlib.c
new file mode 100644
index 0000000..9259f77
--- /dev/null
+++ b/tools/swconfig/swlib.c
@@ -0,0 +1,786 @@
+/*
+ * swlib.c: Switch configuration API (user space part)
+ *
+ * Copyright (C) 2008 Felix Fietkau <nbd@...nwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * version 2.1 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <stdint.h>
+#include <getopt.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include "../../include/uapi/linux/swconfig.h"
+#include "swlib.h"
+#include <netlink/netlink.h>
+#include <netlink/genl/genl.h>
+#include <netlink/genl/family.h>
+
+//#define DEBUG 1
+#ifdef DEBUG
+#define DPRINTF(fmt, ...) fprintf(stderr, "%s(%d): " fmt, __func__, __LINE__, ##__VA_ARGS__)
+#else
+#define DPRINTF(fmt, ...) do {} while (0)
+#endif
+
+static struct nl_handle *handle;
+static struct nl_cache *cache;
+static struct genl_family *family;
+static struct nlattr *tb[SWITCH_ATTR_MAX + 1];
+static int refcount = 0;
+
+static struct nla_policy port_policy[SWITCH_ATTR_MAX] = {
+ [SWITCH_PORT_ID] = { .type = NLA_U32 },
+ [SWITCH_PORT_FLAG_TAGGED] = { .type = NLA_FLAG },
+};
+
+static struct nla_policy portmap_policy[SWITCH_PORTMAP_MAX] = {
+ [SWITCH_PORTMAP_SEGMENT] = { .type = NLA_STRING },
+ [SWITCH_PORTMAP_VIRT] = { .type = NLA_U32 },
+};
+
+static inline void *
+swlib_alloc(size_t size)
+{
+ void *ptr;
+
+ ptr = malloc(size);
+ if (!ptr)
+ goto done;
+ memset(ptr, 0, size);
+
+done:
+ return ptr;
+}
+
+static int
+wait_handler(struct nl_msg *msg, void *arg)
+{
+ int *finished = arg;
+
+ *finished = 1;
+ return NL_STOP;
+}
+
+/* helper function for performing netlink requests */
+static int
+swlib_call(int cmd, int (*call)(struct nl_msg *, void *),
+ int (*data)(struct nl_msg *, void *), void *arg)
+{
+ struct nl_msg *msg;
+ struct nl_cb *cb = NULL;
+ int finished;
+ int flags = 0;
+ int err;
+
+ msg = nlmsg_alloc();
+ if (!msg) {
+ fprintf(stderr, "Out of memory!\n");
+ exit(1);
+ }
+
+ if (!data)
+ flags |= NLM_F_DUMP;
+
+ genlmsg_put(msg, NL_AUTO_PID, NL_AUTO_SEQ, genl_family_get_id(family), 0, flags, cmd, 0);
+ if (data) {
+ if (data(msg, arg) < 0)
+ goto nla_put_failure;
+ }
+
+ cb = nl_cb_alloc(NL_CB_CUSTOM);
+ if (!cb) {
+ fprintf(stderr, "nl_cb_alloc failed.\n");
+ exit(1);
+ }
+
+ err = nl_send_auto_complete(handle, msg);
+ if (err < 0) {
+ fprintf(stderr, "nl_send_auto_complete failed: %d\n", err);
+ goto out;
+ }
+
+ finished = 0;
+
+ if (call)
+ nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, call, arg);
+
+ if (data)
+ nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, wait_handler, &finished);
+ else
+ nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, wait_handler, &finished);
+
+ err = nl_recvmsgs(handle, cb);
+ if (err < 0) {
+ goto out;
+ }
+
+ if (!finished)
+ err = nl_wait_for_ack(handle);
+
+out:
+ if (cb)
+ nl_cb_put(cb);
+nla_put_failure:
+ nlmsg_free(msg);
+ return err;
+}
+
+static int
+send_attr(struct nl_msg *msg, void *arg)
+{
+ struct switch_val *val = arg;
+ struct switch_attr *attr = val->attr;
+
+ NLA_PUT_U32(msg, SWITCH_ATTR_ID, attr->dev->id);
+ NLA_PUT_U32(msg, SWITCH_ATTR_OP_ID, attr->id);
+ switch(attr->atype) {
+ case SWLIB_ATTR_GROUP_PORT:
+ NLA_PUT_U32(msg, SWITCH_ATTR_OP_PORT, val->port_vlan);
+ break;
+ case SWLIB_ATTR_GROUP_VLAN:
+ NLA_PUT_U32(msg, SWITCH_ATTR_OP_VLAN, val->port_vlan);
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+
+nla_put_failure:
+ return -1;
+}
+
+static int
+store_port_val(struct nl_msg *msg, struct nlattr *nla, struct switch_val *val)
+{
+ struct nlattr *p;
+ int ports = val->attr->dev->ports;
+ int err = 0;
+ int remaining;
+
+ if (!val->value.ports)
+ val->value.ports = malloc(sizeof(struct switch_port) * ports);
+
+ nla_for_each_nested(p, nla, remaining) {
+ struct nlattr *tb[SWITCH_PORT_ATTR_MAX+1];
+ struct switch_port *port;
+
+ if (val->len >= ports)
+ break;
+
+ err = nla_parse_nested(tb, SWITCH_PORT_ATTR_MAX, p, port_policy);
+ if (err < 0)
+ goto out;
+
+ if (!tb[SWITCH_PORT_ID])
+ continue;
+
+ port = &val->value.ports[val->len];
+ port->id = nla_get_u32(tb[SWITCH_PORT_ID]);
+ port->flags = 0;
+ if (tb[SWITCH_PORT_FLAG_TAGGED])
+ port->flags |= SWLIB_PORT_FLAG_TAGGED;
+
+ val->len++;
+ }
+
+out:
+ return err;
+}
+
+static int
+store_val(struct nl_msg *msg, void *arg)
+{
+ struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
+ struct switch_val *val = arg;
+ struct switch_attr *attr = val->attr;
+
+ if (!val)
+ goto error;
+
+ if (nla_parse(tb, SWITCH_ATTR_MAX - 1, genlmsg_attrdata(gnlh, 0),
+ genlmsg_attrlen(gnlh, 0), NULL) < 0) {
+ goto error;
+ }
+
+ if (tb[SWITCH_ATTR_OP_VALUE_INT])
+ val->value.i = nla_get_u32(tb[SWITCH_ATTR_OP_VALUE_INT]);
+ else if (tb[SWITCH_ATTR_OP_VALUE_STR])
+ val->value.s = strdup(nla_get_string(tb[SWITCH_ATTR_OP_VALUE_STR]));
+ else if (tb[SWITCH_ATTR_OP_VALUE_PORTS])
+ val->err = store_port_val(msg, tb[SWITCH_ATTR_OP_VALUE_PORTS], val);
+
+ val->err = 0;
+ return 0;
+
+error:
+ return NL_SKIP;
+}
+
+int
+swlib_get_attr(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val)
+{
+ int cmd;
+ int err;
+
+ switch(attr->atype) {
+ case SWLIB_ATTR_GROUP_GLOBAL:
+ cmd = SWITCH_CMD_GET_GLOBAL;
+ break;
+ case SWLIB_ATTR_GROUP_PORT:
+ cmd = SWITCH_CMD_GET_PORT;
+ break;
+ case SWLIB_ATTR_GROUP_VLAN:
+ cmd = SWITCH_CMD_GET_VLAN;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ memset(&val->value, 0, sizeof(val->value));
+ val->len = 0;
+ val->attr = attr;
+ val->err = -EINVAL;
+ err = swlib_call(cmd, store_val, send_attr, val);
+ if (!err)
+ err = val->err;
+
+ return err;
+}
+
+static int
+send_attr_ports(struct nl_msg *msg, struct switch_val *val)
+{
+ struct nlattr *n;
+ int i;
+
+ /* TODO implement multipart? */
+ if (val->len == 0)
+ goto done;
+ n = nla_nest_start(msg, SWITCH_ATTR_OP_VALUE_PORTS);
+ if (!n)
+ goto nla_put_failure;
+ for (i = 0; i < val->len; i++) {
+ struct switch_port *port = &val->value.ports[i];
+ struct nlattr *np;
+
+ np = nla_nest_start(msg, SWITCH_ATTR_PORT);
+ if (!np)
+ goto nla_put_failure;
+
+ NLA_PUT_U32(msg, SWITCH_PORT_ID, port->id);
+ if (port->flags & SWLIB_PORT_FLAG_TAGGED)
+ NLA_PUT_FLAG(msg, SWITCH_PORT_FLAG_TAGGED);
+
+ nla_nest_end(msg, np);
+ }
+ nla_nest_end(msg, n);
+done:
+ return 0;
+
+nla_put_failure:
+ return -1;
+}
+
+static int
+send_attr_val(struct nl_msg *msg, void *arg)
+{
+ struct switch_val *val = arg;
+ struct switch_attr *attr = val->attr;
+
+ if (send_attr(msg, arg))
+ goto nla_put_failure;
+
+ switch(attr->type) {
+ case SWITCH_TYPE_NOVAL:
+ break;
+ case SWITCH_TYPE_INT:
+ NLA_PUT_U32(msg, SWITCH_ATTR_OP_VALUE_INT, val->value.i);
+ break;
+ case SWITCH_TYPE_STRING:
+ if (!val->value.s)
+ goto nla_put_failure;
+ NLA_PUT_STRING(msg, SWITCH_ATTR_OP_VALUE_STR, val->value.s);
+ break;
+ case SWITCH_TYPE_PORTS:
+ if (send_attr_ports(msg, val) < 0)
+ goto nla_put_failure;
+ break;
+ default:
+ goto nla_put_failure;
+ }
+ return 0;
+
+nla_put_failure:
+ return -1;
+}
+
+int
+swlib_set_attr(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val)
+{
+ int cmd;
+
+ switch(attr->atype) {
+ case SWLIB_ATTR_GROUP_GLOBAL:
+ cmd = SWITCH_CMD_SET_GLOBAL;
+ break;
+ case SWLIB_ATTR_GROUP_PORT:
+ cmd = SWITCH_CMD_SET_PORT;
+ break;
+ case SWLIB_ATTR_GROUP_VLAN:
+ cmd = SWITCH_CMD_SET_VLAN;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ val->attr = attr;
+ return swlib_call(cmd, NULL, send_attr_val, val);
+}
+
+int swlib_set_attr_string(struct switch_dev *dev, struct switch_attr *a, int port_vlan, const char *str)
+{
+ struct switch_port *ports;
+ struct switch_val val;
+ char *ptr;
+
+ memset(&val, 0, sizeof(val));
+ val.port_vlan = port_vlan;
+ switch(a->type) {
+ case SWITCH_TYPE_INT:
+ val.value.i = atoi(str);
+ break;
+ case SWITCH_TYPE_STRING:
+ val.value.s = str;
+ break;
+ case SWITCH_TYPE_PORTS:
+ ports = alloca(sizeof(struct switch_port) * dev->ports);
+ memset(ports, 0, sizeof(struct switch_port) * dev->ports);
+ val.len = 0;
+ ptr = (char *)str;
+ while(ptr && *ptr)
+ {
+ while(*ptr && isspace(*ptr))
+ ptr++;
+
+ if (!*ptr)
+ break;
+
+ if (!isdigit(*ptr))
+ return -1;
+
+ if (val.len >= dev->ports)
+ return -1;
+
+ ports[val.len].flags = 0;
+ ports[val.len].id = strtoul(ptr, &ptr, 10);
+ while(*ptr && !isspace(*ptr)) {
+ if (*ptr == 't')
+ ports[val.len].flags |= SWLIB_PORT_FLAG_TAGGED;
+ else
+ return -1;
+
+ ptr++;
+ }
+ if (*ptr)
+ ptr++;
+ val.len++;
+ }
+ val.value.ports = ports;
+ break;
+ case SWITCH_TYPE_NOVAL:
+ if (str && !strcmp(str, "0"))
+ return 0;
+
+ break;
+ default:
+ return -1;
+ }
+ return swlib_set_attr(dev, a, &val);
+}
+
+
+struct attrlist_arg {
+ int id;
+ int atype;
+ struct switch_dev *dev;
+ struct switch_attr *prev;
+ struct switch_attr **head;
+};
+
+static int
+add_id(struct nl_msg *msg, void *arg)
+{
+ struct attrlist_arg *l = arg;
+
+ NLA_PUT_U32(msg, SWITCH_ATTR_ID, l->id);
+
+ return 0;
+nla_put_failure:
+ return -1;
+}
+
+static int
+add_attr(struct nl_msg *msg, void *ptr)
+{
+ struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
+ struct attrlist_arg *arg = ptr;
+ struct switch_attr *new;
+
+ if (nla_parse(tb, SWITCH_ATTR_MAX - 1, genlmsg_attrdata(gnlh, 0),
+ genlmsg_attrlen(gnlh, 0), NULL) < 0)
+ goto done;
+
+ new = swlib_alloc(sizeof(struct switch_attr));
+ if (!new)
+ goto done;
+
+ new->dev = arg->dev;
+ new->atype = arg->atype;
+ if (arg->prev) {
+ arg->prev->next = new;
+ } else {
+ arg->prev = *arg->head;
+ }
+ *arg->head = new;
+ arg->head = &new->next;
+
+ if (tb[SWITCH_ATTR_OP_ID])
+ new->id = nla_get_u32(tb[SWITCH_ATTR_OP_ID]);
+ if (tb[SWITCH_ATTR_OP_TYPE])
+ new->type = nla_get_u32(tb[SWITCH_ATTR_OP_TYPE]);
+ if (tb[SWITCH_ATTR_OP_NAME])
+ new->name = strdup(nla_get_string(tb[SWITCH_ATTR_OP_NAME]));
+ if (tb[SWITCH_ATTR_OP_DESCRIPTION])
+ new->description = strdup(nla_get_string(tb[SWITCH_ATTR_OP_DESCRIPTION]));
+
+done:
+ return NL_SKIP;
+}
+
+int
+swlib_scan(struct switch_dev *dev)
+{
+ struct attrlist_arg arg;
+
+ if (dev->ops || dev->port_ops || dev->vlan_ops)
+ return 0;
+
+ arg.atype = SWLIB_ATTR_GROUP_GLOBAL;
+ arg.dev = dev;
+ arg.id = dev->id;
+ arg.prev = NULL;
+ arg.head = &dev->ops;
+ swlib_call(SWITCH_CMD_LIST_GLOBAL, add_attr, add_id, &arg);
+
+ arg.atype = SWLIB_ATTR_GROUP_PORT;
+ arg.prev = NULL;
+ arg.head = &dev->port_ops;
+ swlib_call(SWITCH_CMD_LIST_PORT, add_attr, add_id, &arg);
+
+ arg.atype = SWLIB_ATTR_GROUP_VLAN;
+ arg.prev = NULL;
+ arg.head = &dev->vlan_ops;
+ swlib_call(SWITCH_CMD_LIST_VLAN, add_attr, add_id, &arg);
+
+ return 0;
+}
+
+struct switch_attr *swlib_lookup_attr(struct switch_dev *dev,
+ enum swlib_attr_group atype, const char *name)
+{
+ struct switch_attr *head;
+
+ if (!name || !dev)
+ return NULL;
+
+ switch(atype) {
+ case SWLIB_ATTR_GROUP_GLOBAL:
+ head = dev->ops;
+ break;
+ case SWLIB_ATTR_GROUP_PORT:
+ head = dev->port_ops;
+ break;
+ case SWLIB_ATTR_GROUP_VLAN:
+ head = dev->vlan_ops;
+ break;
+ }
+ while(head) {
+ if (!strcmp(name, head->name))
+ return head;
+ head = head->next;
+ }
+
+ return NULL;
+}
+
+static void
+swlib_priv_free(void)
+{
+ if (cache)
+ nl_cache_free(cache);
+ if (handle)
+ nl_handle_destroy(handle);
+ handle = NULL;
+ cache = NULL;
+}
+
+static int
+swlib_priv_init(void)
+{
+ int ret;
+
+ handle = nl_handle_alloc();
+ if (!handle) {
+ DPRINTF("Failed to create handle\n");
+ goto err;
+ }
+
+ if (genl_connect(handle)) {
+ DPRINTF("Failed to connect to generic netlink\n");
+ goto err;
+ }
+
+ cache = genl_ctrl_alloc_cache(handle);
+ if (!cache) {
+ DPRINTF("Failed to allocate netlink cache\n");
+ goto err;
+ }
+
+ family = genl_ctrl_search_by_name(cache, "switch");
+ if (!family) {
+ DPRINTF("Switch API not present\n");
+ goto err;
+ }
+ return 0;
+
+err:
+ swlib_priv_free();
+ return -EINVAL;
+}
+
+struct swlib_scan_arg {
+ const char *name;
+ struct switch_dev *head;
+ struct switch_dev *ptr;
+};
+
+static int
+add_port_map(struct switch_dev *dev, struct nlattr *nla)
+{
+ struct nlattr *p;
+ int err = 0, idx = 0;
+ int remaining;
+
+ dev->maps = malloc(sizeof(struct switch_portmap) * dev->ports);
+ if (!dev->maps)
+ return -1;
+ memset(dev->maps, 0, sizeof(struct switch_portmap) * dev->ports);
+
+ nla_for_each_nested(p, nla, remaining) {
+ struct nlattr *tb[SWITCH_PORTMAP_MAX+1];
+
+ if (idx >= dev->ports)
+ continue;
+
+ err = nla_parse_nested(tb, SWITCH_PORTMAP_MAX, p, portmap_policy);
+ if (err < 0)
+ continue;
+
+
+ if (tb[SWITCH_PORTMAP_SEGMENT] && tb[SWITCH_PORTMAP_VIRT]) {
+ dev->maps[idx].segment = strdup(nla_get_string(tb[SWITCH_PORTMAP_SEGMENT]));
+ dev->maps[idx].virt = nla_get_u32(tb[SWITCH_PORTMAP_VIRT]);
+ }
+ idx++;
+ }
+
+out:
+ return err;
+}
+
+
+static int
+add_switch(struct nl_msg *msg, void *arg)
+{
+ struct swlib_scan_arg *sa = arg;
+ struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
+ struct switch_dev *dev;
+ const char *name;
+ const char *alias;
+
+ if (nla_parse(tb, SWITCH_ATTR_MAX, genlmsg_attrdata(gnlh, 0), genlmsg_attrlen(gnlh, 0), NULL) < 0)
+ goto done;
+
+ if (!tb[SWITCH_ATTR_DEV_NAME])
+ goto done;
+
+ name = nla_get_string(tb[SWITCH_ATTR_DEV_NAME]);
+ alias = nla_get_string(tb[SWITCH_ATTR_ALIAS]);
+
+ if (sa->name && (strcmp(name, sa->name) != 0) && (strcmp(alias, sa->name) != 0))
+ goto done;
+
+ dev = swlib_alloc(sizeof(struct switch_dev));
+ if (!dev)
+ goto done;
+
+ strncpy(dev->dev_name, name, IFNAMSIZ - 1);
+ dev->alias = strdup(alias);
+ if (tb[SWITCH_ATTR_ID])
+ dev->id = nla_get_u32(tb[SWITCH_ATTR_ID]);
+ if (tb[SWITCH_ATTR_NAME])
+ dev->name = strdup(nla_get_string(tb[SWITCH_ATTR_NAME]));
+ if (tb[SWITCH_ATTR_PORTS])
+ dev->ports = nla_get_u32(tb[SWITCH_ATTR_PORTS]);
+ if (tb[SWITCH_ATTR_VLANS])
+ dev->vlans = nla_get_u32(tb[SWITCH_ATTR_VLANS]);
+ if (tb[SWITCH_ATTR_CPU_PORT])
+ dev->cpu_port = nla_get_u32(tb[SWITCH_ATTR_CPU_PORT]);
+ if (tb[SWITCH_ATTR_PORTMAP])
+ add_port_map(dev, tb[SWITCH_ATTR_PORTMAP]);
+
+ if (!sa->head) {
+ sa->head = dev;
+ sa->ptr = dev;
+ } else {
+ sa->ptr->next = dev;
+ sa->ptr = dev;
+ }
+
+ refcount++;
+done:
+ return NL_SKIP;
+}
+
+static int
+list_switch(struct nl_msg *msg, void *arg)
+{
+ struct swlib_scan_arg *sa = arg;
+ struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
+ struct switch_dev *dev;
+ const char *name;
+ const char *alias;
+
+ if (nla_parse(tb, SWITCH_ATTR_MAX, genlmsg_attrdata(gnlh, 0), genlmsg_attrlen(gnlh, 0), NULL) < 0)
+ goto done;
+
+ if (!tb[SWITCH_ATTR_DEV_NAME] || !tb[SWITCH_ATTR_NAME])
+ goto done;
+
+ printf("Found: %s - %s\n", nla_get_string(tb[SWITCH_ATTR_DEV_NAME]),
+ nla_get_string(tb[SWITCH_ATTR_ALIAS]));
+
+done:
+ return NL_SKIP;
+}
+
+void
+swlib_list(void)
+{
+ if (swlib_priv_init() < 0)
+ return;
+ swlib_call(SWITCH_CMD_GET_SWITCH, list_switch, NULL, NULL);
+ swlib_priv_free();
+}
+
+void
+swlib_print_portmap(struct switch_dev *dev, char *segment)
+{
+ int i;
+
+ if (segment) {
+ if (!strcmp(segment, "cpu")) {
+ printf("%d ", dev->cpu_port);
+ } else if (!strcmp(segment, "disabled")) {
+ for (i = 0; i < dev->ports; i++)
+ if (!dev->maps[i].segment)
+ printf("%d ", i);
+ } else for (i = 0; i < dev->ports; i++) {
+ if (dev->maps[i].segment && !strcmp(dev->maps[i].segment, segment))
+ printf("%d ", i);
+ }
+ } else {
+ printf("%s - %s\n", dev->dev_name, dev->name);
+ for (i = 0; i < dev->ports; i++)
+ if (i == dev->cpu_port)
+ printf("port%d:\tcpu\n", i);
+ else if (dev->maps[i].segment)
+ printf("port%d:\t%s.%d\n", i, dev->maps[i].segment, dev->maps[i].virt);
+ else
+ printf("port%d:\tdisabled\n", i);
+ }
+}
+
+struct switch_dev *
+swlib_connect(const char *name)
+{
+ struct swlib_scan_arg arg;
+ int err;
+
+ if (!refcount) {
+ if (swlib_priv_init() < 0)
+ return NULL;
+ };
+
+ arg.head = NULL;
+ arg.ptr = NULL;
+ arg.name = name;
+ swlib_call(SWITCH_CMD_GET_SWITCH, add_switch, NULL, &arg);
+
+ if (!refcount)
+ swlib_priv_free();
+
+ return arg.head;
+}
+
+static void
+swlib_free_attributes(struct switch_attr **head)
+{
+ struct switch_attr *a = *head;
+ struct switch_attr *next;
+
+ while (a) {
+ next = a->next;
+ free(a);
+ a = next;
+ }
+ *head = NULL;
+}
+
+void
+swlib_free(struct switch_dev *dev)
+{
+ swlib_free_attributes(&dev->ops);
+ swlib_free_attributes(&dev->port_ops);
+ swlib_free_attributes(&dev->vlan_ops);
+ free(dev);
+
+ if (--refcount == 0)
+ swlib_priv_free();
+}
+
+void
+swlib_free_all(struct switch_dev *dev)
+{
+ struct switch_dev *p;
+
+ while (dev) {
+ p = dev->next;
+ swlib_free(dev);
+ dev = p;
+ }
+}
diff --git a/tools/swconfig/swlib.h b/tools/swconfig/swlib.h
new file mode 100644
index 0000000..dba68b2
--- /dev/null
+++ b/tools/swconfig/swlib.h
@@ -0,0 +1,244 @@
+/*
+ * swlib.h: Switch configuration API (user space part)
+ *
+ * Copyright (C) 2008-2009 Felix Fietkau <nbd@...nwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * version 2.1 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+
+Usage of the library functions:
+
+ The main datastructure for a switch is the struct switch_device
+ To get started, you first need to use switch_connect() to probe
+ for switches and allocate an instance of this struct.
+
+ There are two possible usage modes:
+ dev = switch_connect("eth0");
+ - this call will look for a switch registered for the linux device
+ "eth0" and only allocate a switch_device for this particular switch.
+
+ dev = switch_connect(NULL)
+ - this will return one switch_device struct for each available
+ switch. The switch_device structs are chained with by ->next pointer
+
+ Then to query a switch for all available attributes, use:
+ swlib_scan(dev);
+
+ All allocated datastructures for the switch_device struct can be freed with
+ swlib_free(dev);
+ or
+ swlib_free_all(dev);
+
+ The latter traverses a whole chain of switch_device structs and frees them all
+
+ Switch attributes (struct switch_attr) are divided into three groups:
+ dev->ops:
+ - global settings
+ dev->port_ops:
+ - per-port settings
+ dev->vlan_ops:
+ - per-vlan settings
+
+ switch_lookup_attr() is a small helper function to locate attributes
+ by name.
+
+ switch_set_attr() and switch_get_attr() can alter or request the values
+ of attributes.
+
+Usage of the switch_attr struct:
+
+ ->atype: attribute group, one of:
+ - SWLIB_ATTR_GROUP_GLOBAL
+ - SWLIB_ATTR_GROUP_VLAN
+ - SWLIB_ATTR_GROUP_PORT
+
+ ->id: identifier for the attribute
+
+ ->type: data type, one of:
+ - SWITCH_TYPE_INT
+ - SWITCH_TYPE_STRING
+ - SWITCH_TYPE_PORT
+
+ ->name: short name of the attribute
+ ->description: longer description
+ ->next: pointer to the next attribute of the current group
+
+
+Usage of the switch_val struct:
+
+ When setting attributes, following members of the struct switch_val need
+ to be set up:
+
+ ->len (for attr->type == SWITCH_TYPE_PORT)
+ ->port_vlan:
+ - port number (for attr->atype == SWLIB_ATTR_GROUP_PORT), or:
+ - vlan number (for attr->atype == SWLIB_ATTR_GROUP_VLAN)
+ ->value.i (for attr->type == SWITCH_TYPE_INT)
+ ->value.s (for attr->type == SWITCH_TYPE_STRING)
+ - owned by the caller, not stored in the library internally
+ ->value.ports (for attr->type == SWITCH_TYPE_PORT)
+ - must point to an array of at lest val->len * sizeof(struct switch_port)
+
+ When getting string attributes, val->value.s must be freed by the caller
+ When getting port list attributes, an internal static buffer is used,
+ which changes from call to call.
+
+ */
+
+#ifndef __SWLIB_H
+#define __SWLIB_H
+
+enum swlib_attr_group {
+ SWLIB_ATTR_GROUP_GLOBAL,
+ SWLIB_ATTR_GROUP_VLAN,
+ SWLIB_ATTR_GROUP_PORT,
+};
+
+enum swlib_port_flags {
+ SWLIB_PORT_FLAG_TAGGED = (1 << 0),
+};
+
+
+struct switch_dev;
+struct switch_attr;
+struct switch_port;
+struct switch_port_map;
+struct switch_val;
+
+struct switch_dev {
+ int id;
+ char dev_name[IFNAMSIZ];
+ const char *name;
+ const char *alias;
+ int ports;
+ int vlans;
+ int cpu_port;
+ struct switch_attr *ops;
+ struct switch_attr *port_ops;
+ struct switch_attr *vlan_ops;
+ struct switch_portmap *maps;
+ struct switch_dev *next;
+ void *priv;
+};
+
+struct switch_val {
+ struct switch_attr *attr;
+ int len;
+ int err;
+ int port_vlan;
+ union {
+ const char *s;
+ int i;
+ struct switch_port *ports;
+ } value;
+};
+
+struct switch_attr {
+ struct switch_dev *dev;
+ int atype;
+ int id;
+ int type;
+ const char *name;
+ const char *description;
+ struct switch_attr *next;
+};
+
+struct switch_port {
+ unsigned int id;
+ unsigned int flags;
+};
+
+struct switch_portmap {
+ unsigned int virt;
+ const char *segment;
+};
+
+/**
+ * swlib_list: list all switches
+ */
+void swlib_list(void);
+
+/**
+ * swlib_print_portmap: get portmap
+ * @dev: switch device struct
+ */
+void swlib_print_portmap(struct switch_dev *dev, char *segment);
+
+/**
+ * swlib_connect: connect to the switch through netlink
+ * @name: name of the ethernet interface,
+ *
+ * if name is NULL, it connect and builds a chain of all switches
+ */
+struct switch_dev *swlib_connect(const char *name);
+
+/**
+ * swlib_free: free all dynamically allocated data for the switch connection
+ * @dev: switch device struct
+ *
+ * all members of a switch device chain (generated by swlib_connect(NULL))
+ * must be freed individually
+ */
+void swlib_free(struct switch_dev *dev);
+
+/**
+ * swlib_free_all: run swlib_free on all devices in the chain
+ * @dev: switch device struct
+ */
+void swlib_free_all(struct switch_dev *dev);
+
+/**
+ * swlib_scan: probe the switch driver for available commands/attributes
+ * @dev: switch device struct
+ */
+int swlib_scan(struct switch_dev *dev);
+
+/**
+ * swlib_lookup_attr: look up a switch attribute
+ * @dev: switch device struct
+ * @type: global, port or vlan
+ * @name: name of the attribute
+ */
+struct switch_attr *swlib_lookup_attr(struct switch_dev *dev,
+ enum swlib_attr_group atype, const char *name);
+
+/**
+ * swlib_set_attr: set the value for an attribute
+ * @dev: switch device struct
+ * @attr: switch attribute struct
+ * @val: attribute value pointer
+ * returns 0 on success
+ */
+int swlib_set_attr(struct switch_dev *dev, struct switch_attr *attr,
+ struct switch_val *val);
+
+/**
+ * swlib_set_attr_string: set the value for an attribute with type conversion
+ * @dev: switch device struct
+ * @attr: switch attribute struct
+ * @port_vlan: port or vlan (if applicable)
+ * @str: string value
+ * returns 0 on success
+ */
+int swlib_set_attr_string(struct switch_dev *dev, struct switch_attr *attr,
+ int port_vlan, const char *str);
+
+/**
+ * swlib_get_attr: get the value for an attribute
+ * @dev: switch device struct
+ * @attr: switch attribute struct
+ * @val: attribute value pointer
+ * returns 0 on success
+ * for string attributes, the result string must be freed by the caller
+ */
+int swlib_get_attr(struct switch_dev *dev, struct switch_attr *attr,
+ struct switch_val *val);
+
+#endif
--
1.8.3.2
--
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