blob: 0c2132f0a25178feb7d609f3281d4e7072856440 [file] [log] [blame]
/*
* devlink.c Devlink tool
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Authors: Jiri Pirko <jiri@mellanox.com>
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <unistd.h>
#include <getopt.h>
#include <limits.h>
#include <errno.h>
#include <linux/genetlink.h>
#include <linux/devlink.h>
#include <libmnl/libmnl.h>
#include "SNAPSHOT.h"
#include "list.h"
#include "mnlg.h"
#define pr_err(args...) fprintf(stderr, ##args)
#define pr_out(args...) fprintf(stdout, ##args)
static int _mnlg_socket_recv_run(struct mnlg_socket *nlg,
mnl_cb_t data_cb, void *data)
{
int err;
err = mnlg_socket_recv_run(nlg, data_cb, data);
if (err < 0) {
pr_err("devlink answers: %s\n", strerror(errno));
return -errno;
}
return 0;
}
static int _mnlg_socket_sndrcv(struct mnlg_socket *nlg,
const struct nlmsghdr *nlh,
mnl_cb_t data_cb, void *data)
{
int err;
err = mnlg_socket_send(nlg, nlh);
if (err < 0) {
pr_err("Failed to call mnlg_socket_send\n");
return -errno;
}
return _mnlg_socket_recv_run(nlg, data_cb, data);
}
static int _mnlg_socket_group_add(struct mnlg_socket *nlg,
const char *group_name)
{
int err;
err = mnlg_socket_group_add(nlg, group_name);
if (err < 0) {
pr_err("Failed to call mnlg_socket_group_add\n");
return -errno;
}
return 0;
}
struct ifname_map {
struct list_head list;
char *bus_name;
char *dev_name;
uint32_t port_index;
char *ifname;
};
static struct ifname_map *ifname_map_alloc(const char *bus_name,
const char *dev_name,
uint32_t port_index,
const char *ifname)
{
struct ifname_map *ifname_map;
ifname_map = calloc(1, sizeof(*ifname_map));
if (!ifname_map)
return NULL;
ifname_map->bus_name = strdup(bus_name);
ifname_map->dev_name = strdup(dev_name);
ifname_map->port_index = port_index;
ifname_map->ifname = strdup(ifname);
if (!ifname_map->bus_name || !ifname_map->dev_name ||
!ifname_map->ifname) {
free(ifname_map->ifname);
free(ifname_map->dev_name);
free(ifname_map->bus_name);
free(ifname_map);
return NULL;
}
return ifname_map;
}
static void ifname_map_free(struct ifname_map *ifname_map)
{
free(ifname_map->ifname);
free(ifname_map->dev_name);
free(ifname_map->bus_name);
free(ifname_map);
}
#define BIT(nr) (1UL << (nr))
#define DL_OPT_HANDLE BIT(0)
#define DL_OPT_HANDLEP BIT(1)
#define DL_OPT_PORT_TYPE BIT(2)
#define DL_OPT_PORT_COUNT BIT(3)
struct dl_opts {
uint32_t present; /* flags of present items */
char *bus_name;
char *dev_name;
uint32_t port_index;
enum devlink_port_type port_type;
uint32_t port_count;
};
struct dl {
struct mnlg_socket *nlg;
struct list_head ifname_map_list;
int argc;
char **argv;
bool no_nice_names;
struct dl_opts opts;
};
static int dl_argc(struct dl *dl)
{
return dl->argc;
}
static char *dl_argv(struct dl *dl)
{
if (dl_argc(dl) == 0)
return NULL;
return *dl->argv;
}
static void dl_arg_inc(struct dl *dl)
{
if (dl_argc(dl) == 0)
return;
dl->argc--;
dl->argv++;
}
static char *dl_argv_next(struct dl *dl)
{
char *ret;
if (dl_argc(dl) == 0)
return NULL;
ret = *dl->argv;
dl_arg_inc(dl);
return ret;
}
static char *dl_argv_index(struct dl *dl, unsigned int index)
{
if (index >= dl_argc(dl))
return NULL;
return dl->argv[index];
}
static int strcmpx(const char *str1, const char *str2)
{
if (strlen(str1) > strlen(str2))
return -1;
return strncmp(str1, str2, strlen(str1));
}
static bool dl_argv_match(struct dl *dl, const char *pattern)
{
if (dl_argc(dl) == 0)
return false;
return strcmpx(dl_argv(dl), pattern) == 0;
}
static bool dl_no_arg(struct dl *dl)
{
return dl_argc(dl) == 0;
}
static int attr_cb(const struct nlattr *attr, void *data)
{
const struct nlattr **tb = data;
int type;
type = mnl_attr_get_type(attr);
if (mnl_attr_type_valid(attr, DEVLINK_ATTR_MAX) < 0)
return MNL_CB_ERROR;
if (type == DEVLINK_ATTR_BUS_NAME &&
mnl_attr_validate(attr, MNL_TYPE_NUL_STRING) < 0)
return MNL_CB_ERROR;
if (type == DEVLINK_ATTR_DEV_NAME &&
mnl_attr_validate(attr, MNL_TYPE_NUL_STRING) < 0)
return MNL_CB_ERROR;
if (type == DEVLINK_ATTR_PORT_INDEX &&
mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
return MNL_CB_ERROR;
if (type == DEVLINK_ATTR_PORT_TYPE &&
mnl_attr_validate(attr, MNL_TYPE_U16) < 0)
return MNL_CB_ERROR;
if (type == DEVLINK_ATTR_PORT_DESIRED_TYPE &&
mnl_attr_validate(attr, MNL_TYPE_U16) < 0)
return MNL_CB_ERROR;
if (type == DEVLINK_ATTR_PORT_NETDEV_IFINDEX &&
mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
return MNL_CB_ERROR;
if (type == DEVLINK_ATTR_PORT_NETDEV_NAME &&
mnl_attr_validate(attr, MNL_TYPE_NUL_STRING) < 0)
return MNL_CB_ERROR;
if (type == DEVLINK_ATTR_PORT_IBDEV_NAME &&
mnl_attr_validate(attr, MNL_TYPE_NUL_STRING) < 0)
return MNL_CB_ERROR;
tb[type] = attr;
return MNL_CB_OK;
}
static int ifname_map_cb(const struct nlmsghdr *nlh, void *data)
{
struct nlattr *tb[DEVLINK_ATTR_MAX + 1] = {};
struct genlmsghdr *genl = mnl_nlmsg_get_payload(nlh);
struct dl *dl = data;
struct ifname_map *ifname_map;
const char *bus_name;
const char *dev_name;
uint32_t port_ifindex;
const char *port_ifname;
mnl_attr_parse(nlh, sizeof(*genl), attr_cb, tb);
if (!tb[DEVLINK_ATTR_BUS_NAME] || !tb[DEVLINK_ATTR_DEV_NAME] ||
!tb[DEVLINK_ATTR_PORT_INDEX])
return MNL_CB_ERROR;
if (!tb[DEVLINK_ATTR_PORT_NETDEV_NAME])
return MNL_CB_OK;
bus_name = mnl_attr_get_str(tb[DEVLINK_ATTR_BUS_NAME]);
dev_name = mnl_attr_get_str(tb[DEVLINK_ATTR_DEV_NAME]);
port_ifindex = mnl_attr_get_u32(tb[DEVLINK_ATTR_PORT_INDEX]);
port_ifname = mnl_attr_get_str(tb[DEVLINK_ATTR_PORT_NETDEV_NAME]);
ifname_map = ifname_map_alloc(bus_name, dev_name,
port_ifindex, port_ifname);
if (!ifname_map)
return MNL_CB_ERROR;
list_add(&ifname_map->list, &dl->ifname_map_list);
return MNL_CB_OK;
}
static void ifname_map_fini(struct dl *dl)
{
struct ifname_map *ifname_map, *tmp;
list_for_each_entry_safe(ifname_map, tmp,
&dl->ifname_map_list, list) {
list_del(&ifname_map->list);
ifname_map_free(ifname_map);
}
}
static int ifname_map_init(struct dl *dl)
{
struct nlmsghdr *nlh;
int err;
INIT_LIST_HEAD(&dl->ifname_map_list);
nlh = mnlg_msg_prepare(dl->nlg, DEVLINK_CMD_PORT_GET,
NLM_F_REQUEST | NLM_F_ACK | NLM_F_DUMP);
err = _mnlg_socket_sndrcv(dl->nlg, nlh, ifname_map_cb, dl);
if (err) {
ifname_map_fini(dl);
return err;
}
return 0;
}
static int ifname_map_lookup(struct dl *dl, const char *ifname,
char **p_bus_name, char **p_dev_name,
uint32_t *p_port_index)
{
struct ifname_map *ifname_map;
list_for_each_entry(ifname_map, &dl->ifname_map_list, list) {
if (strcmp(ifname, ifname_map->ifname) == 0) {
*p_bus_name = ifname_map->bus_name;
*p_dev_name = ifname_map->dev_name;
*p_port_index = ifname_map->port_index;
return 0;
}
}
return -ENOENT;
}
static int ifname_map_rev_lookup(struct dl *dl, const char *bus_name,
const char *dev_name, uint32_t port_index,
char **p_ifname)
{
struct ifname_map *ifname_map;
list_for_each_entry(ifname_map, &dl->ifname_map_list, list) {
if (strcmp(bus_name, ifname_map->bus_name) == 0 &&
strcmp(dev_name, ifname_map->dev_name) == 0 &&
port_index == ifname_map->port_index) {
*p_ifname = ifname_map->ifname;
return 0;
}
}
return -ENOENT;
}
static unsigned int strslashcount(char *str)
{
unsigned int count = 0;
char *pos = str;
while ((pos = strchr(pos, '/'))) {
count++;
pos++;
}
return count;
}
static int strslashrsplit(char *str, char **before, char **after)
{
char *slash;
slash = strrchr(str, '/');
if (!slash)
return -EINVAL;
*slash = '\0';
*before = str;
*after = slash + 1;
return 0;
}
static int strtouint32_t(const char *str, uint32_t *p_val)
{
char *endptr;
unsigned long int val;
val = strtoul(str, &endptr, 10);
if (endptr == str || *endptr != '\0')
return -EINVAL;
if (val > UINT_MAX)
return -ERANGE;
*p_val = val;
return 0;
}
static int dl_argv_handle(struct dl *dl, char **p_bus_name, char **p_dev_name)
{
char *str = dl_argv_next(dl);
if (!str) {
pr_err("Devlink identification (\"bus_name/dev_name\") expected\n");
return -EINVAL;
}
if (strslashcount(str) != 1) {
pr_err("Wrong devlink identification string format.\n");
pr_err("Expected \"bus_name/dev_name\".\n");
return -EINVAL;
}
strslashrsplit(str, p_bus_name, p_dev_name);
return 0;
}
static int dl_argv_handle_port(struct dl *dl, char **p_bus_name,
char **p_dev_name, uint32_t *p_port_index)
{
char *str = dl_argv_next(dl);
unsigned int slash_count;
int err;
if (!str) {
pr_err("Port identification (\"bus_name/dev_name/port_index\" or \"netdev ifname\") expected.\n");
return -EINVAL;
}
slash_count = strslashcount(str);
if (slash_count != 2 && slash_count != 0) {
pr_err("Wrong port identification string format.\n");
pr_err("Expected \"bus_name/dev_name/port_index\" or \"netdev_ifname\".\n");
return -EINVAL;
}
if (slash_count == 2) {
char *handlestr = handlestr;
char *portstr = portstr;
err = strslashrsplit(str, &handlestr, &portstr);
err = strtouint32_t(portstr, p_port_index);
if (err) {
pr_err("Port index \"%s\" is not a number or not within range\n",
portstr);
return err;
}
strslashrsplit(handlestr, p_bus_name, p_dev_name);
} else if (slash_count == 0) {
err = ifname_map_lookup(dl, str, p_bus_name, p_dev_name,
p_port_index);
if (err) {
pr_err("Netdevice \"%s\" not found\n", str);
return err;
}
}
return 0;
}
static int dl_argv_uint32_t(struct dl *dl, uint32_t *p_val)
{
char *str = dl_argv_next(dl);
int err;
if (!str) {
pr_err("Unsigned number argument expected\n");
return -EINVAL;
}
err = strtouint32_t(str, p_val);
if (err) {
pr_err("\"%s\" is not a number or not within range\n", str);
return err;
}
return 0;
}
static int dl_argv_str(struct dl *dl, const char **p_str)
{
const char *str = dl_argv_next(dl);
if (!str) {
pr_err("String parameter expected\n");
return -EINVAL;
}
*p_str = str;
return 0;
}
static int port_type_get(const char *typestr, enum devlink_port_type *p_type)
{
if (strcmp(typestr, "auto") == 0) {
*p_type = DEVLINK_PORT_TYPE_AUTO;
} else if (strcmp(typestr, "eth") == 0) {
*p_type = DEVLINK_PORT_TYPE_ETH;
} else if (strcmp(typestr, "ib") == 0) {
*p_type = DEVLINK_PORT_TYPE_IB;
} else {
pr_err("Unknown port type \"%s\"\n", typestr);
return -EINVAL;
}
return 0;
}
static int dl_argv_parse(struct dl *dl, uint32_t o_required,
uint32_t o_optional)
{
struct dl_opts *opts = &dl->opts;
uint32_t o_all = o_required | o_optional;
uint32_t o_found = 0;
int err;
if (o_required & DL_OPT_HANDLE) {
err = dl_argv_handle(dl, &opts->bus_name, &opts->dev_name);
if (err)
return err;
o_found |= DL_OPT_HANDLE;
} else if (o_required & DL_OPT_HANDLEP) {
err = dl_argv_handle_port(dl, &opts->bus_name, &opts->dev_name,
&opts->port_index);
if (err)
return err;
o_found |= DL_OPT_HANDLEP;
}
while (dl_argc(dl)) {
if (dl_argv_match(dl, "type") &&
(o_all & DL_OPT_PORT_TYPE)) {
const char *typestr;
dl_arg_inc(dl);
err = dl_argv_str(dl, &typestr);
if (err)
return err;
err = port_type_get(typestr, &opts->port_type);
if (err)
return err;
o_found |= DL_OPT_PORT_TYPE;
} else if (dl_argv_match(dl, "count") &&
(o_all & DL_OPT_PORT_COUNT)) {
dl_arg_inc(dl);
err = dl_argv_uint32_t(dl, &opts->port_count);
if (err)
return err;
o_found |= DL_OPT_PORT_COUNT;
} else {
pr_err("Unknown option \"%s\"\n", dl_argv(dl));
return -EINVAL;
}
}
opts->present = o_found;
if ((o_required & DL_OPT_PORT_TYPE) && !(o_found & DL_OPT_PORT_TYPE)) {
pr_err("Port type option expected.\n");
return -EINVAL;
}
if ((o_required & DL_OPT_PORT_COUNT) &&
!(o_found & DL_OPT_PORT_COUNT)) {
pr_err("Port split count option expected.\n");
return -EINVAL;
}
return 0;
}
static void dl_opts_put(struct nlmsghdr *nlh, struct dl *dl)
{
struct dl_opts *opts = &dl->opts;
if (opts->present & DL_OPT_HANDLE) {
mnl_attr_put_strz(nlh, DEVLINK_ATTR_BUS_NAME, opts->bus_name);
mnl_attr_put_strz(nlh, DEVLINK_ATTR_DEV_NAME, opts->dev_name);
} else if (opts->present & DL_OPT_HANDLEP) {
mnl_attr_put_strz(nlh, DEVLINK_ATTR_BUS_NAME, opts->bus_name);
mnl_attr_put_strz(nlh, DEVLINK_ATTR_DEV_NAME, opts->dev_name);
mnl_attr_put_u32(nlh, DEVLINK_ATTR_PORT_INDEX,
opts->port_index);
}
if (opts->present & DL_OPT_PORT_TYPE)
mnl_attr_put_u16(nlh, DEVLINK_ATTR_PORT_TYPE,
opts->port_type);
if (opts->present & DL_OPT_PORT_COUNT)
mnl_attr_put_u32(nlh, DEVLINK_ATTR_PORT_SPLIT_COUNT,
opts->port_count);
}
static int dl_argv_parse_put(struct nlmsghdr *nlh, struct dl *dl,
uint32_t o_required, uint32_t o_optional)
{
int err;
err = dl_argv_parse(dl, o_required, o_optional);
if (err)
return err;
dl_opts_put(nlh, dl);
return 0;
}
static void cmd_dev_help(void)
{
pr_out("Usage: devlink dev show [ DEV ]\n");
}
static void __pr_out_handle(const char *bus_name, const char *dev_name)
{
pr_out("%s/%s", bus_name, dev_name);
}
static void pr_out_handle(struct nlattr **tb)
{
__pr_out_handle(mnl_attr_get_str(tb[DEVLINK_ATTR_BUS_NAME]),
mnl_attr_get_str(tb[DEVLINK_ATTR_DEV_NAME]));
}
static void __pr_out_port_handle(const char *bus_name, const char *dev_name,
uint32_t port_index)
{
__pr_out_handle(bus_name, dev_name);
pr_out("/%d", port_index);
}
static void pr_out_port_handle(struct nlattr **tb)
{
__pr_out_port_handle(mnl_attr_get_str(tb[DEVLINK_ATTR_BUS_NAME]),
mnl_attr_get_str(tb[DEVLINK_ATTR_DEV_NAME]),
mnl_attr_get_u32(tb[DEVLINK_ATTR_PORT_INDEX]));
}
static void __pr_out_port_handle_nice(struct dl *dl, const char *bus_name,
const char *dev_name, uint32_t port_index)
{
char *ifname;
int err;
if (dl->no_nice_names)
goto no_nice_names;
err = ifname_map_rev_lookup(dl, bus_name, dev_name,
port_index, &ifname);
if (err)
goto no_nice_names;
pr_out("%s", ifname);
return;
no_nice_names:
__pr_out_port_handle(bus_name, dev_name, port_index);
}
static void pr_out_port_handle_nice(struct dl *dl, struct nlattr **tb)
{
const char *bus_name;
const char *dev_name;
uint32_t port_index;
bus_name = mnl_attr_get_str(tb[DEVLINK_ATTR_BUS_NAME]);
dev_name = mnl_attr_get_str(tb[DEVLINK_ATTR_DEV_NAME]);
port_index = mnl_attr_get_u32(tb[DEVLINK_ATTR_PORT_INDEX]);
__pr_out_port_handle_nice(dl, bus_name, dev_name, port_index);
}
static void pr_out_dev(struct nlattr **tb)
{
pr_out_handle(tb);
pr_out("\n");
}
static int cmd_dev_show_cb(const struct nlmsghdr *nlh, void *data)
{
struct nlattr *tb[DEVLINK_ATTR_MAX + 1] = {};
struct genlmsghdr *genl = mnl_nlmsg_get_payload(nlh);
mnl_attr_parse(nlh, sizeof(*genl), attr_cb, tb);
if (!tb[DEVLINK_ATTR_BUS_NAME] || !tb[DEVLINK_ATTR_DEV_NAME])
return MNL_CB_ERROR;
pr_out_dev(tb);
return MNL_CB_OK;
}
static int cmd_dev_show(struct dl *dl)
{
struct nlmsghdr *nlh;
uint16_t flags = NLM_F_REQUEST | NLM_F_ACK;
int err;
if (dl_argc(dl) == 0)
flags |= NLM_F_DUMP;
nlh = mnlg_msg_prepare(dl->nlg, DEVLINK_CMD_GET, flags);
if (dl_argc(dl) > 0) {
err = dl_argv_parse_put(nlh, dl, DL_OPT_HANDLE, 0);
if (err)
return err;
}
return _mnlg_socket_sndrcv(dl->nlg, nlh, cmd_dev_show_cb, NULL);
}
static int cmd_dev(struct dl *dl)
{
if (dl_argv_match(dl, "help")) {
cmd_dev_help();
return 0;
} else if (dl_argv_match(dl, "show") ||
dl_argv_match(dl, "list") || dl_no_arg(dl)) {
dl_arg_inc(dl);
return cmd_dev_show(dl);
}
pr_err("Command \"%s\" not found\n", dl_argv(dl));
return -ENOENT;
}
static void cmd_port_help(void)
{
pr_out("Usage: devlink port show [ DEV/PORT_INDEX ]\n");
pr_out(" devlink port set DEV/PORT_INDEX [ type { eth | ib | auto} ]\n");
pr_out(" devlink port split DEV/PORT_INDEX count COUNT\n");
pr_out(" devlink port unsplit DEV/PORT_INDEX\n");
}
static const char *port_type_name(uint32_t type)
{
switch (type) {
case DEVLINK_PORT_TYPE_NOTSET: return "notset";
case DEVLINK_PORT_TYPE_AUTO: return "auto";
case DEVLINK_PORT_TYPE_ETH: return "eth";
case DEVLINK_PORT_TYPE_IB: return "ib";
default: return "<unknown type>";
}
}
static void pr_out_port(struct nlattr **tb)
{
struct nlattr *pt_attr = tb[DEVLINK_ATTR_PORT_TYPE];
struct nlattr *dpt_attr = tb[DEVLINK_ATTR_PORT_DESIRED_TYPE];
pr_out_port_handle(tb);
pr_out(":");
if (pt_attr) {
uint16_t port_type = mnl_attr_get_u16(pt_attr);
pr_out(" type %s", port_type_name(port_type));
if (dpt_attr) {
uint16_t des_port_type = mnl_attr_get_u16(dpt_attr);
if (port_type != des_port_type)
pr_out("(%s)", port_type_name(des_port_type));
}
}
if (tb[DEVLINK_ATTR_PORT_NETDEV_NAME])
pr_out(" netdev %s",
mnl_attr_get_str(tb[DEVLINK_ATTR_PORT_NETDEV_NAME]));
if (tb[DEVLINK_ATTR_PORT_IBDEV_NAME])
pr_out(" ibdev %s",
mnl_attr_get_str(tb[DEVLINK_ATTR_PORT_IBDEV_NAME]));
if (tb[DEVLINK_ATTR_PORT_SPLIT_GROUP])
pr_out(" split_group %u",
mnl_attr_get_u32(tb[DEVLINK_ATTR_PORT_SPLIT_GROUP]));
pr_out("\n");
}
static int cmd_port_show_cb(const struct nlmsghdr *nlh, void *data)
{
struct nlattr *tb[DEVLINK_ATTR_MAX + 1] = {};
struct genlmsghdr *genl = mnl_nlmsg_get_payload(nlh);
mnl_attr_parse(nlh, sizeof(*genl), attr_cb, tb);
if (!tb[DEVLINK_ATTR_BUS_NAME] || !tb[DEVLINK_ATTR_DEV_NAME] ||
!tb[DEVLINK_ATTR_PORT_INDEX])
return MNL_CB_ERROR;
pr_out_port(tb);
return MNL_CB_OK;
}
static int cmd_port_show(struct dl *dl)
{
struct nlmsghdr *nlh;
uint16_t flags = NLM_F_REQUEST | NLM_F_ACK;
int err;
if (dl_argc(dl) == 0)
flags |= NLM_F_DUMP;
nlh = mnlg_msg_prepare(dl->nlg, DEVLINK_CMD_PORT_GET, flags);
if (dl_argc(dl) > 0) {
err = dl_argv_parse_put(nlh, dl, DL_OPT_HANDLEP, 0);
if (err)
return err;
}
return _mnlg_socket_sndrcv(dl->nlg, nlh, cmd_port_show_cb, NULL);
}
static int cmd_port_set(struct dl *dl)
{
struct nlmsghdr *nlh;
int err;
nlh = mnlg_msg_prepare(dl->nlg, DEVLINK_CMD_PORT_SET,
NLM_F_REQUEST | NLM_F_ACK);
err = dl_argv_parse_put(nlh, dl, DL_OPT_HANDLEP | DL_OPT_PORT_TYPE, 0);
if (err)
return err;
return _mnlg_socket_sndrcv(dl->nlg, nlh, NULL, NULL);
}
static int cmd_port_split(struct dl *dl)
{
struct nlmsghdr *nlh;
int err;
nlh = mnlg_msg_prepare(dl->nlg, DEVLINK_CMD_PORT_SPLIT,
NLM_F_REQUEST | NLM_F_ACK);
err = dl_argv_parse_put(nlh, dl, DL_OPT_HANDLEP | DL_OPT_PORT_COUNT, 0);
if (err)
return err;
return _mnlg_socket_sndrcv(dl->nlg, nlh, NULL, NULL);
}
static int cmd_port_unsplit(struct dl *dl)
{
struct nlmsghdr *nlh;
int err;
nlh = mnlg_msg_prepare(dl->nlg, DEVLINK_CMD_PORT_UNSPLIT,
NLM_F_REQUEST | NLM_F_ACK);
err = dl_argv_parse_put(nlh, dl, DL_OPT_HANDLEP, 0);
if (err)
return err;
return _mnlg_socket_sndrcv(dl->nlg, nlh, NULL, NULL);
}
static int cmd_port(struct dl *dl)
{
if (dl_argv_match(dl, "help")) {
cmd_port_help();
return 0;
} else if (dl_argv_match(dl, "show") ||
dl_argv_match(dl, "list") || dl_no_arg(dl)) {
dl_arg_inc(dl);
return cmd_port_show(dl);
} else if (dl_argv_match(dl, "set")) {
dl_arg_inc(dl);
return cmd_port_set(dl);
} else if (dl_argv_match(dl, "split")) {
dl_arg_inc(dl);
return cmd_port_split(dl);
} else if (dl_argv_match(dl, "unsplit")) {
dl_arg_inc(dl);
return cmd_port_unsplit(dl);
}
pr_err("Command \"%s\" not found\n", dl_argv(dl));
return -ENOENT;
}
static const char *cmd_name(uint8_t cmd)
{
switch (cmd) {
case DEVLINK_CMD_UNSPEC: return "unspec";
case DEVLINK_CMD_GET: return "get";
case DEVLINK_CMD_SET: return "set";
case DEVLINK_CMD_NEW: return "new";
case DEVLINK_CMD_DEL: return "del";
case DEVLINK_CMD_PORT_GET: return "get";
case DEVLINK_CMD_PORT_SET: return "set";
case DEVLINK_CMD_PORT_NEW: return "net";
case DEVLINK_CMD_PORT_DEL: return "del";
default: return "<unknown cmd>";
}
}
static const char *cmd_obj(uint8_t cmd)
{
switch (cmd) {
case DEVLINK_CMD_UNSPEC: return "unspec";
case DEVLINK_CMD_GET:
case DEVLINK_CMD_SET:
case DEVLINK_CMD_NEW:
case DEVLINK_CMD_DEL:
return "dev";
case DEVLINK_CMD_PORT_GET:
case DEVLINK_CMD_PORT_SET:
case DEVLINK_CMD_PORT_NEW:
case DEVLINK_CMD_PORT_DEL:
return "port";
default: return "<unknown obj>";
}
}
static void pr_out_mon_header(uint8_t cmd)
{
pr_out("[%s,%s] ", cmd_obj(cmd), cmd_name(cmd));
}
static bool cmd_filter_check(struct dl *dl, uint8_t cmd)
{
const char *obj = cmd_obj(cmd);
unsigned int index = 0;
const char *cur_obj;
if (dl_no_arg(dl))
return true;
while ((cur_obj = dl_argv_index(dl, index++))) {
if (strcmp(cur_obj, obj) == 0 || strcmp(cur_obj, "all") == 0)
return true;
}
return false;
}
static int cmd_mon_show_cb(const struct nlmsghdr *nlh, void *data)
{
struct dl *dl = data;
struct nlattr *tb[DEVLINK_ATTR_MAX + 1] = {};
struct genlmsghdr *genl = mnl_nlmsg_get_payload(nlh);
uint8_t cmd = genl->cmd;
if (!cmd_filter_check(dl, cmd))
return MNL_CB_OK;
switch (cmd) {
case DEVLINK_CMD_GET: /* fall through */
case DEVLINK_CMD_SET: /* fall through */
case DEVLINK_CMD_NEW: /* fall through */
case DEVLINK_CMD_DEL:
mnl_attr_parse(nlh, sizeof(*genl), attr_cb, tb);
if (!tb[DEVLINK_ATTR_BUS_NAME] || !tb[DEVLINK_ATTR_DEV_NAME])
return MNL_CB_ERROR;
pr_out_mon_header(genl->cmd);
pr_out_dev(tb);
break;
case DEVLINK_CMD_PORT_GET: /* fall through */
case DEVLINK_CMD_PORT_SET: /* fall through */
case DEVLINK_CMD_PORT_NEW: /* fall through */
case DEVLINK_CMD_PORT_DEL:
mnl_attr_parse(nlh, sizeof(*genl), attr_cb, tb);
if (!tb[DEVLINK_ATTR_BUS_NAME] || !tb[DEVLINK_ATTR_DEV_NAME] ||
!tb[DEVLINK_ATTR_PORT_INDEX])
return MNL_CB_ERROR;
pr_out_mon_header(genl->cmd);
pr_out_port(tb);
break;
}
return MNL_CB_OK;
}
static int cmd_mon_show(struct dl *dl)
{
int err;
unsigned int index = 0;
const char *cur_obj;
while ((cur_obj = dl_argv_index(dl, index++))) {
if (strcmp(cur_obj, "all") != 0 &&
strcmp(cur_obj, "dev") != 0 &&
strcmp(cur_obj, "port") != 0) {
pr_err("Unknown object \"%s\"\n", cur_obj);
return -EINVAL;
}
}
err = _mnlg_socket_group_add(dl->nlg, DEVLINK_GENL_MCGRP_CONFIG_NAME);
if (err)
return err;
err = _mnlg_socket_recv_run(dl->nlg, cmd_mon_show_cb, dl);
if (err)
return err;
return 0;
}
static void cmd_mon_help(void)
{
pr_out("Usage: devlink monitor [ all | OBJECT-LIST ]\n"
"where OBJECT-LIST := { dev | port }\n");
}
static int cmd_mon(struct dl *dl)
{
if (dl_argv_match(dl, "help")) {
cmd_mon_help();
return 0;
} else if (dl_no_arg(dl)) {
dl_arg_inc(dl);
return cmd_mon_show(dl);
}
pr_err("Command \"%s\" not found\n", dl_argv(dl));
return -ENOENT;
}
static void help(void)
{
pr_out("Usage: devlink [ OPTIONS ] OBJECT { COMMAND | help }\n"
"where OBJECT := { dev | port | monitor }\n"
" OPTIONS := { -V[ersion] | -n[no-nice-names] }\n");
}
static int dl_cmd(struct dl *dl)
{
if (dl_argv_match(dl, "help") || dl_no_arg(dl)) {
help();
return 0;
} else if (dl_argv_match(dl, "dev")) {
dl_arg_inc(dl);
return cmd_dev(dl);
} else if (dl_argv_match(dl, "port")) {
dl_arg_inc(dl);
return cmd_port(dl);
} else if (dl_argv_match(dl, "monitor")) {
dl_arg_inc(dl);
return cmd_mon(dl);
}
pr_err("Object \"%s\" not found\n", dl_argv(dl));
return -ENOENT;
}
static int dl_init(struct dl *dl, int argc, char **argv)
{
int err;
dl->argc = argc;
dl->argv = argv;
dl->nlg = mnlg_socket_open(DEVLINK_GENL_NAME, DEVLINK_GENL_VERSION);
if (!dl->nlg) {
pr_err("Failed to connect to devlink Netlink\n");
return -errno;
}
err = ifname_map_init(dl);
if (err) {
pr_err("Failed to create index map\n");
goto err_ifname_map_create;
}
return 0;
err_ifname_map_create:
mnlg_socket_close(dl->nlg);
return err;
}
static void dl_fini(struct dl *dl)
{
ifname_map_fini(dl);
mnlg_socket_close(dl->nlg);
}
static struct dl *dl_alloc(void)
{
struct dl *dl;
dl = calloc(1, sizeof(*dl));
if (!dl)
return NULL;
return dl;
}
static void dl_free(struct dl *dl)
{
free(dl);
}
int main(int argc, char **argv)
{
static const struct option long_options[] = {
{ "Version", no_argument, NULL, 'V' },
{ "no-nice-names", no_argument, NULL, 'n' },
{ NULL, 0, NULL, 0 }
};
struct dl *dl;
int opt;
int err;
int ret;
dl = dl_alloc();
if (!dl) {
pr_err("Failed to allocate memory for devlink\n");
return EXIT_FAILURE;
}
while ((opt = getopt_long(argc, argv, "Vn",
long_options, NULL)) >= 0) {
switch (opt) {
case 'V':
printf("devlink utility, iproute2-ss%s\n", SNAPSHOT);
return EXIT_SUCCESS;
case 'n':
dl->no_nice_names = true;
break;
default:
pr_err("Unknown option.\n");
help();
return EXIT_FAILURE;
}
}
argc -= optind;
argv += optind;
err = dl_init(dl, argc, argv);
if (err) {
ret = EXIT_FAILURE;
goto dl_free;
}
err = dl_cmd(dl);
if (err) {
ret = EXIT_FAILURE;
goto dl_fini;
}
ret = EXIT_SUCCESS;
dl_fini:
dl_fini(dl);
dl_free:
dl_free(dl);
return ret;
}