Adding upstream version 6.1.0.upstream/6.1.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 616 insertions, 0 deletions

diff --git a/dcb/dcb.c b/dcb/dcb.c
new file mode 100644
index 0000000..391fd95
--- /dev/null
+++ b/dcb/dcb.c
@@ -0,0 +1,616 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <inttypes.h>
+#include <stdio.h>
+#include <linux/dcbnl.h>
+#include <libmnl/libmnl.h>
+#include <getopt.h>
+
+#include "dcb.h"
+#include "mnl_utils.h"
+#include "namespace.h"
+#include "utils.h"
+#include "version.h"
+
+static int dcb_init(struct dcb *dcb)
+{
+	dcb->buf = malloc(MNL_SOCKET_BUFFER_SIZE);
+	if (dcb->buf == NULL) {
+		perror("Netlink buffer allocation");
+		return -1;
+	}
+
+	dcb->nl = mnlu_socket_open(NETLINK_ROUTE);
+	if (dcb->nl == NULL) {
+		perror("Open netlink socket");
+		goto err_socket_open;
+	}
+
+	new_json_obj_plain(dcb->json_output);
+	return 0;
+
+err_socket_open:
+	free(dcb->buf);
+	return -1;
+}
+
+static void dcb_fini(struct dcb *dcb)
+{
+	delete_json_obj_plain();
+	mnl_socket_close(dcb->nl);
+	free(dcb->buf);
+}
+
+static struct dcb *dcb_alloc(void)
+{
+	struct dcb *dcb;
+
+	dcb = calloc(1, sizeof(*dcb));
+	if (!dcb)
+		return NULL;
+	return dcb;
+}
+
+static void dcb_free(struct dcb *dcb)
+{
+	free(dcb);
+}
+
+struct dcb_get_attribute {
+	struct dcb *dcb;
+	int attr;
+	void *payload;
+	__u16 payload_len;
+};
+
+static int dcb_get_attribute_attr_ieee_cb(const struct nlattr *attr, void *data)
+{
+	struct dcb_get_attribute *ga = data;
+
+	if (mnl_attr_get_type(attr) != ga->attr)
+		return MNL_CB_OK;
+
+	ga->payload = mnl_attr_get_payload(attr);
+	ga->payload_len = mnl_attr_get_payload_len(attr);
+	return MNL_CB_STOP;
+}
+
+static int dcb_get_attribute_attr_cb(const struct nlattr *attr, void *data)
+{
+	if (mnl_attr_get_type(attr) != DCB_ATTR_IEEE)
+		return MNL_CB_OK;
+
+	return mnl_attr_parse_nested(attr, dcb_get_attribute_attr_ieee_cb, data);
+}
+
+static int dcb_get_attribute_cb(const struct nlmsghdr *nlh, void *data)
+{
+	return mnl_attr_parse(nlh, sizeof(struct dcbmsg), dcb_get_attribute_attr_cb, data);
+}
+
+static int dcb_get_attribute_bare_cb(const struct nlmsghdr *nlh, void *data)
+{
+	/* Bare attributes (e.g. DCB_ATTR_DCBX) are not wrapped inside an IEEE
+	 * container, so this does not have to go through unpacking in
+	 * dcb_get_attribute_attr_cb().
+	 */
+	return mnl_attr_parse(nlh, sizeof(struct dcbmsg),
+			      dcb_get_attribute_attr_ieee_cb, data);
+}
+
+struct dcb_set_attribute_response {
+	int response_attr;
+};
+
+static int dcb_set_attribute_attr_cb(const struct nlattr *attr, void *data)
+{
+	struct dcb_set_attribute_response *resp = data;
+	uint16_t len;
+	int8_t err;
+
+	if (mnl_attr_get_type(attr) != resp->response_attr)
+		return MNL_CB_OK;
+
+	len = mnl_attr_get_payload_len(attr);
+	if (len != 1) {
+		fprintf(stderr, "Response attribute expected to have size 1, not %d\n", len);
+		return MNL_CB_ERROR;
+	}
+
+	/* The attribute is formally u8, but actually an i8 containing a
+	 * negative errno value.
+	 */
+	err = mnl_attr_get_u8(attr);
+	if (err) {
+		errno = -err;
+		return MNL_CB_ERROR;
+	}
+
+	return MNL_CB_STOP;
+}
+
+static int dcb_set_attribute_cb(const struct nlmsghdr *nlh, void *data)
+{
+	return mnl_attr_parse(nlh, sizeof(struct dcbmsg), dcb_set_attribute_attr_cb, data);
+}
+
+static int dcb_talk(struct dcb *dcb, struct nlmsghdr *nlh, mnl_cb_t cb, void *data)
+{
+	int ret;
+
+	ret = mnl_socket_sendto(dcb->nl, nlh, nlh->nlmsg_len);
+	if (ret < 0) {
+		perror("mnl_socket_sendto");
+		return -1;
+	}
+
+	return mnlu_socket_recv_run(dcb->nl, nlh->nlmsg_seq, dcb->buf, MNL_SOCKET_BUFFER_SIZE,
+				    cb, data);
+}
+
+static struct nlmsghdr *dcb_prepare(struct dcb *dcb, const char *dev,
+				    uint32_t nlmsg_type, uint8_t dcb_cmd)
+{
+	struct dcbmsg dcbm = {
+		.cmd = dcb_cmd,
+	};
+	struct nlmsghdr *nlh;
+
+	nlh = mnlu_msg_prepare(dcb->buf, nlmsg_type, NLM_F_REQUEST | NLM_F_ACK,
+			       &dcbm, sizeof(dcbm));
+	mnl_attr_put_strz(nlh, DCB_ATTR_IFNAME, dev);
+	return nlh;
+}
+
+static int __dcb_get_attribute(struct dcb *dcb, int command,
+			       const char *dev, int attr,
+			       void **payload_p, __u16 *payload_len_p,
+			       int (*get_attribute_cb)(const struct nlmsghdr *nlh,
+						       void *data))
+{
+	struct dcb_get_attribute ga;
+	struct nlmsghdr *nlh;
+	int ret;
+
+	nlh = dcb_prepare(dcb, dev, RTM_GETDCB, command);
+
+	ga = (struct dcb_get_attribute) {
+		.dcb = dcb,
+		.attr = attr,
+		.payload = NULL,
+	};
+	ret = dcb_talk(dcb, nlh, get_attribute_cb, &ga);
+	if (ret) {
+		perror("Attribute read");
+		return ret;
+	}
+	if (ga.payload == NULL) {
+		perror("Attribute not found");
+		return -ENOENT;
+	}
+
+	*payload_p = ga.payload;
+	*payload_len_p = ga.payload_len;
+	return 0;
+}
+
+int dcb_get_attribute_va(struct dcb *dcb, const char *dev, int attr,
+			 void **payload_p, __u16 *payload_len_p)
+{
+	return __dcb_get_attribute(dcb, DCB_CMD_IEEE_GET, dev, attr,
+				   payload_p, payload_len_p,
+				   dcb_get_attribute_cb);
+}
+
+int dcb_get_attribute_bare(struct dcb *dcb, int cmd, const char *dev, int attr,
+			   void **payload_p, __u16 *payload_len_p)
+{
+	return __dcb_get_attribute(dcb, cmd, dev, attr,
+				   payload_p, payload_len_p,
+				   dcb_get_attribute_bare_cb);
+}
+
+int dcb_get_attribute(struct dcb *dcb, const char *dev, int attr, void *data, size_t data_len)
+{
+	__u16 payload_len;
+	void *payload;
+	int ret;
+
+	ret = dcb_get_attribute_va(dcb, dev, attr, &payload, &payload_len);
+	if (ret)
+		return ret;
+
+	if (payload_len != data_len) {
+		fprintf(stderr, "Wrong len %d, expected %zd\n", payload_len, data_len);
+		return -EINVAL;
+	}
+
+	memcpy(data, payload, data_len);
+	return 0;
+}
+
+static int __dcb_set_attribute(struct dcb *dcb, int command, const char *dev,
+			       int (*cb)(struct dcb *, struct nlmsghdr *, void *),
+			       void *data, int response_attr)
+{
+	struct dcb_set_attribute_response resp = {
+		.response_attr = response_attr,
+	};
+	struct nlmsghdr *nlh;
+	int ret;
+
+	nlh = dcb_prepare(dcb, dev, RTM_SETDCB, command);
+
+	ret = cb(dcb, nlh, data);
+	if (ret)
+		return ret;
+
+	errno = 0;
+	ret = dcb_talk(dcb, nlh, dcb_set_attribute_cb, &resp);
+	if (ret) {
+		if (errno)
+			perror("Attribute write");
+		return ret;
+	}
+	return 0;
+}
+
+struct dcb_set_attribute_ieee_cb {
+	int (*cb)(struct dcb *dcb, struct nlmsghdr *nlh, void *data);
+	void *data;
+};
+
+static int dcb_set_attribute_ieee_cb(struct dcb *dcb, struct nlmsghdr *nlh, void *data)
+{
+	struct dcb_set_attribute_ieee_cb *ieee_data = data;
+	struct nlattr *nest;
+	int ret;
+
+	nest = mnl_attr_nest_start(nlh, DCB_ATTR_IEEE);
+	ret = ieee_data->cb(dcb, nlh, ieee_data->data);
+	if (ret)
+		return ret;
+	mnl_attr_nest_end(nlh, nest);
+
+	return 0;
+}
+
+int dcb_set_attribute_va(struct dcb *dcb, int command, const char *dev,
+			 int (*cb)(struct dcb *dcb, struct nlmsghdr *nlh, void *data),
+			 void *data)
+{
+	struct dcb_set_attribute_ieee_cb ieee_data = {
+		.cb = cb,
+		.data = data,
+	};
+
+	return __dcb_set_attribute(dcb, command, dev,
+				   &dcb_set_attribute_ieee_cb, &ieee_data,
+				   DCB_ATTR_IEEE);
+}
+
+struct dcb_set_attribute {
+	int attr;
+	const void *data;
+	size_t data_len;
+};
+
+static int dcb_set_attribute_put(struct dcb *dcb, struct nlmsghdr *nlh, void *data)
+{
+	struct dcb_set_attribute *dsa = data;
+
+	mnl_attr_put(nlh, dsa->attr, dsa->data_len, dsa->data);
+	return 0;
+}
+
+int dcb_set_attribute(struct dcb *dcb, const char *dev, int attr, const void *data, size_t data_len)
+{
+	struct dcb_set_attribute dsa = {
+		.attr = attr,
+		.data = data,
+		.data_len = data_len,
+	};
+
+	return dcb_set_attribute_va(dcb, DCB_CMD_IEEE_SET, dev,
+				    &dcb_set_attribute_put, &dsa);
+}
+
+int dcb_set_attribute_bare(struct dcb *dcb, int command, const char *dev,
+			   int attr, const void *data, size_t data_len,
+			   int response_attr)
+{
+	struct dcb_set_attribute dsa = {
+		.attr = attr,
+		.data = data,
+		.data_len = data_len,
+	};
+
+	return __dcb_set_attribute(dcb, command, dev,
+				   &dcb_set_attribute_put, &dsa, response_attr);
+}
+
+void dcb_print_array_u8(const __u8 *array, size_t size)
+{
+	size_t i;
+
+	for (i = 0; i < size; i++) {
+		print_uint(PRINT_JSON, NULL, NULL, array[i]);
+		print_uint(PRINT_FP, NULL, "%zd:", i);
+		print_uint(PRINT_FP, NULL, "%d ", array[i]);
+	}
+}
+
+void dcb_print_array_u64(const __u64 *array, size_t size)
+{
+	size_t i;
+
+	for (i = 0; i < size; i++) {
+		print_u64(PRINT_JSON, NULL, NULL, array[i]);
+		print_uint(PRINT_FP, NULL, "%zd:", i);
+		print_u64(PRINT_FP, NULL, "%" PRIu64 " ", array[i]);
+	}
+}
+
+void dcb_print_array_on_off(const __u8 *array, size_t size)
+{
+	size_t i;
+
+	for (i = 0; i < size; i++) {
+		print_on_off(PRINT_JSON, NULL, NULL, array[i]);
+		print_uint(PRINT_FP, NULL, "%zd:", i);
+		print_on_off(PRINT_FP, NULL, "%s ", array[i]);
+	}
+}
+
+void dcb_print_array_kw(const __u8 *array, size_t array_size,
+			const char *const kw[], size_t kw_size)
+{
+	size_t i;
+
+	for (i = 0; i < array_size; i++) {
+		const char *str = "???";
+		__u8 emt = array[i];
+
+		if (emt < kw_size && kw[emt])
+			str = kw[emt];
+		print_string(PRINT_JSON, NULL, NULL, str);
+		print_uint(PRINT_FP, NULL, "%zd:", i);
+		print_string(PRINT_FP, NULL, "%s ", str);
+	}
+}
+
+void dcb_print_named_array(const char *json_name, const char *fp_name,
+			   const __u8 *array, size_t size,
+			   void (*print_array)(const __u8 *, size_t))
+{
+	open_json_array(PRINT_JSON, json_name);
+	print_string(PRINT_FP, NULL, "%s ", fp_name);
+	print_array(array, size);
+	close_json_array(PRINT_JSON, json_name);
+}
+
+int dcb_parse_mapping(const char *what_key, __u32 key, __u32 max_key,
+		      const char *what_value, __u64 value, __u64 max_value,
+		      void (*set_array)(__u32 index, __u64 value, void *data),
+		      void *set_array_data)
+{
+	bool is_all = key == (__u32) -1;
+
+	if (!is_all && key > max_key) {
+		fprintf(stderr, "In %s:%s mapping, %s is expected to be 0..%d\n",
+			what_key, what_value, what_key, max_key);
+		return -EINVAL;
+	}
+
+	if (value > max_value) {
+		fprintf(stderr, "In %s:%s mapping, %s is expected to be 0..%llu\n",
+			what_key, what_value, what_value, max_value);
+		return -EINVAL;
+	}
+
+	if (is_all) {
+		for (key = 0; key <= max_key; key++)
+			set_array(key, value, set_array_data);
+	} else {
+		set_array(key, value, set_array_data);
+	}
+
+	return 0;
+}
+
+void dcb_set_u8(__u32 key, __u64 value, void *data)
+{
+	__u8 *array = data;
+
+	array[key] = value;
+}
+
+void dcb_set_u32(__u32 key, __u64 value, void *data)
+{
+	__u32 *array = data;
+
+	array[key] = value;
+}
+
+void dcb_set_u64(__u32 key, __u64 value, void *data)
+{
+	__u64 *array = data;
+
+	array[key] = value;
+}
+
+int dcb_cmd_parse_dev(struct dcb *dcb, int argc, char **argv,
+		      int (*and_then)(struct dcb *dcb, const char *dev,
+				      int argc, char **argv),
+		      void (*help)(void))
+{
+	const char *dev;
+
+	if (!argc || matches(*argv, "help") == 0) {
+		help();
+		return 0;
+	} else if (matches(*argv, "dev") == 0) {
+		NEXT_ARG();
+		dev = *argv;
+		if (check_ifname(dev)) {
+			invarg("not a valid ifname", *argv);
+			return -EINVAL;
+		}
+		NEXT_ARG_FWD();
+		return and_then(dcb, dev, argc, argv);
+	} else {
+		fprintf(stderr, "Expected `dev DEV', not `%s'", *argv);
+		help();
+		return -EINVAL;
+	}
+}
+
+static void dcb_help(void)
+{
+	fprintf(stderr,
+		"Usage: dcb [ OPTIONS ] OBJECT { COMMAND | help }\n"
+		"       dcb [ -f | --force ] { -b | --batch } filename [ -n | --netns ] netnsname\n"
+		"where  OBJECT := { app | buffer | dcbx | ets | maxrate | pfc }\n"
+		"       OPTIONS := [ -V | --Version | -i | --iec | -j | --json\n"
+		"                  | -N | --Numeric | -p | --pretty\n"
+		"                  | -s | --statistics | -v | --verbose]\n");
+}
+
+static int dcb_cmd(struct dcb *dcb, int argc, char **argv)
+{
+	if (!argc || matches(*argv, "help") == 0) {
+		dcb_help();
+		return 0;
+	} else if (matches(*argv, "app") == 0) {
+		return dcb_cmd_app(dcb, argc - 1, argv + 1);
+	} else if (matches(*argv, "buffer") == 0) {
+		return dcb_cmd_buffer(dcb, argc - 1, argv + 1);
+	} else if (matches(*argv, "dcbx") == 0) {
+		return dcb_cmd_dcbx(dcb, argc - 1, argv + 1);
+	} else if (matches(*argv, "ets") == 0) {
+		return dcb_cmd_ets(dcb, argc - 1, argv + 1);
+	} else if (matches(*argv, "maxrate") == 0) {
+		return dcb_cmd_maxrate(dcb, argc - 1, argv + 1);
+	} else if (matches(*argv, "pfc") == 0) {
+		return dcb_cmd_pfc(dcb, argc - 1, argv + 1);
+	}
+
+	fprintf(stderr, "Object \"%s\" is unknown\n", *argv);
+	return -ENOENT;
+}
+
+static int dcb_batch_cmd(int argc, char *argv[], void *data)
+{
+	struct dcb *dcb = data;
+
+	return dcb_cmd(dcb, argc, argv);
+}
+
+static int dcb_batch(struct dcb *dcb, const char *name, bool force)
+{
+	return do_batch(name, force, dcb_batch_cmd, dcb);
+}
+
+int main(int argc, char **argv)
+{
+	static const struct option long_options[] = {
+		{ "Version",		no_argument,		NULL, 'V' },
+		{ "force",		no_argument,		NULL, 'f' },
+		{ "batch",		required_argument,	NULL, 'b' },
+		{ "iec",		no_argument,		NULL, 'i' },
+		{ "json",		no_argument,		NULL, 'j' },
+		{ "Numeric",		no_argument,		NULL, 'N' },
+		{ "pretty",		no_argument,		NULL, 'p' },
+		{ "statistics",		no_argument,		NULL, 's' },
+		{ "netns",		required_argument,	NULL, 'n' },
+		{ "help",		no_argument,		NULL, 'h' },
+		{ NULL, 0, NULL, 0 }
+	};
+	const char *batch_file = NULL;
+	bool force = false;
+	struct dcb *dcb;
+	int opt;
+	int err;
+	int ret;
+
+	dcb = dcb_alloc();
+	if (!dcb) {
+		fprintf(stderr, "Failed to allocate memory for dcb\n");
+		return EXIT_FAILURE;
+	}
+
+	while ((opt = getopt_long(argc, argv, "b:fhijn:psvNV",
+				  long_options, NULL)) >= 0) {
+
+		switch (opt) {
+		case 'V':
+			printf("dcb utility, iproute2-%s\n", version);
+			ret = EXIT_SUCCESS;
+			goto dcb_free;
+		case 'f':
+			force = true;
+			break;
+		case 'b':
+			batch_file = optarg;
+			break;
+		case 'j':
+			dcb->json_output = true;
+			break;
+		case 'N':
+			dcb->numeric = true;
+			break;
+		case 'p':
+			pretty = true;
+			break;
+		case 's':
+			dcb->stats = true;
+			break;
+		case 'n':
+			if (netns_switch(optarg)) {
+				ret = EXIT_FAILURE;
+				goto dcb_free;
+			}
+			break;
+		case 'i':
+			dcb->use_iec = true;
+			break;
+		case 'h':
+			dcb_help();
+			ret = EXIT_SUCCESS;
+			goto dcb_free;
+		default:
+			fprintf(stderr, "Unknown option.\n");
+			dcb_help();
+			ret = EXIT_FAILURE;
+			goto dcb_free;
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	err = dcb_init(dcb);
+	if (err) {
+		ret = EXIT_FAILURE;
+		goto dcb_free;
+	}
+
+	if (batch_file)
+		err = dcb_batch(dcb, batch_file, force);
+	else
+		err = dcb_cmd(dcb, argc, argv);
+
+	if (err) {
+		ret = EXIT_FAILURE;
+		goto dcb_fini;
+	}
+
+	ret = EXIT_SUCCESS;
+
+dcb_fini:
+	dcb_fini(dcb);
+dcb_free:
+	dcb_free(dcb);
+
+	return ret;
+}