[mirror_ovs.git] / lib / bundle.c

/* Copyright (c) 2011 Nicira Networks.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <config.h>

#include "bundle.h"

#include <arpa/inet.h>
#include <inttypes.h>

#include "dynamic-string.h"
#include "multipath.h"
#include "nx-match.h"
#include "ofpbuf.h"
#include "ofp-util.h"
#include "openflow/nicira-ext.h"
#include "vlog.h"

#define BUNDLE_MAX_SLAVES 2048

VLOG_DEFINE_THIS_MODULE(bundle);

static uint16_t
execute_ab(const struct nx_action_bundle *nab,
           bool (*slave_enabled)(uint16_t ofp_port, void *aux), void *aux)
{
    size_t i;

    for (i = 0; i < ntohs(nab->n_slaves); i++) {
        uint16_t slave = bundle_get_slave(nab, i);

        if (slave_enabled(slave, aux)) {
            return slave;
        }
    }

    return OFPP_NONE;
}

static uint16_t
execute_hrw(const struct nx_action_bundle *nab, const struct flow *flow,
            bool (*slave_enabled)(uint16_t ofp_port, void *aux), void *aux)
{
    uint32_t flow_hash, best_hash;
    int best, i;

    flow_hash = flow_hash_fields(flow, ntohs(nab->fields), ntohs(nab->basis));
    best = -1;
    best_hash = 0;

    for (i = 0; i < ntohs(nab->n_slaves); i++) {
        if (slave_enabled(bundle_get_slave(nab, i), aux)) {
            uint32_t hash = hash_2words(i, flow_hash);

            if (best < 0 || hash > best_hash) {
                best_hash = hash;
                best = i;
            }
        }
    }

    return best >= 0 ? bundle_get_slave(nab, best) : OFPP_NONE;
}

/* Executes 'nab' on 'flow'.  Uses 'slave_enabled' to determine if the slave
 * designated by 'ofp_port' is up.  Returns the chosen slave, or OFPP_NONE if
 * none of the slaves are acceptable. */
uint16_t
bundle_execute(const struct nx_action_bundle *nab, const struct flow *flow,
               bool (*slave_enabled)(uint16_t ofp_port, void *aux), void *aux)
{
    switch (ntohs(nab->algorithm)) {
    case NX_BD_ALG_HRW: return execute_hrw(nab, flow, slave_enabled, aux);
    case NX_BD_ALG_ACTIVE_BACKUP: return execute_ab(nab, slave_enabled, aux);
    default: NOT_REACHED();
    }
}

void
bundle_execute_load(const struct nx_action_bundle *nab, struct flow *flow,
                    bool (*slave_enabled)(uint16_t ofp_port, void *aux),
                    void *aux)
{
    nxm_reg_load(nab->dst, nab->ofs_nbits,
                 bundle_execute(nab, flow, slave_enabled, aux), flow);
}

/* Checks that 'nab' specifies a bundle action which is supported by this
 * bundle module.  Uses the 'max_ports' parameter to validate each port using
 * ofputil_check_output_port().  Returns 0 if 'nab' is supported, otherwise an
 * OpenFlow error code (as returned by ofp_mkerr()). */
int
bundle_check(const struct nx_action_bundle *nab, int max_ports,
             const struct flow *flow)
{
    static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
    uint16_t n_slaves, fields, algorithm, subtype;
    uint32_t slave_type;
    size_t slaves_size, i;
    int error;

    subtype = ntohs(nab->subtype);
    n_slaves = ntohs(nab->n_slaves);
    fields = ntohs(nab->fields);
    algorithm = ntohs(nab->algorithm);
    slave_type = ntohl(nab->slave_type);
    slaves_size = ntohs(nab->len) - sizeof *nab;

    error = ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT);
    if (!flow_hash_fields_valid(fields)) {
        VLOG_WARN_RL(&rl, "unsupported fields %"PRIu16, fields);
    } else if (n_slaves > BUNDLE_MAX_SLAVES) {
        VLOG_WARN_RL(&rl, "too may slaves");
    } else if (algorithm != NX_BD_ALG_HRW
               && algorithm != NX_BD_ALG_ACTIVE_BACKUP) {
        VLOG_WARN_RL(&rl, "unsupported algorithm %"PRIu16, algorithm);
    } else if (slave_type != NXM_OF_IN_PORT) {
        VLOG_WARN_RL(&rl, "unsupported slave type %"PRIu16, slave_type);
    } else {
        error = 0;
    }

    for (i = 0; i < sizeof(nab->zero); i++) {
        if (nab->zero[i]) {
            VLOG_WARN_RL(&rl, "reserved field is nonzero");
            error = ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT);
        }
    }

    if (subtype == NXAST_BUNDLE && (nab->ofs_nbits || nab->dst)) {
        VLOG_WARN_RL(&rl, "bundle action has nonzero reserved fields");
        error = ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT);
    }

    if (subtype == NXAST_BUNDLE_LOAD) {
        int ofs = nxm_decode_ofs(nab->ofs_nbits);
        int n_bits = nxm_decode_n_bits(nab->ofs_nbits);

        if (n_bits < 16) {
            VLOG_WARN_RL(&rl, "bundle_load action requires at least 16 bit "
                         "destination.");
            error = ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT);
        } else {
            error = nxm_dst_check(nab->dst, ofs, n_bits, flow) || error;
        }
    }

    if (slaves_size < n_slaves * sizeof(ovs_be16)) {
        VLOG_WARN_RL(&rl, "Nicira action %"PRIu16" only has %zu bytes "
                     "allocated for slaves.  %zu bytes are required for "
                     "%"PRIu16" slaves.", subtype, slaves_size,
                     n_slaves * sizeof(ovs_be16), n_slaves);
        error = ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
    }

    for (i = 0; i < n_slaves; i++) {
        uint16_t ofp_port = bundle_get_slave(nab, i);
        int ofputil_error = ofputil_check_output_port(ofp_port, max_ports);

        if (ofputil_error) {
            VLOG_WARN_RL(&rl, "invalid slave %"PRIu16, ofp_port);
            error = ofputil_error;
        }

        /* Controller slaves are unsupported due to the lack of a max_len
         * argument. This may or may not change in the future.  There doesn't
         * seem to be a real-world use-case for supporting it. */
        if (ofp_port == OFPP_CONTROLLER) {
            VLOG_WARN_RL(&rl, "unsupported controller slave");
            error = ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_OUT_PORT);
        }
    }

    return error;
}

/* Helper for bundle_parse and bundle_parse_load. */
static void
bundle_parse__(struct ofpbuf *b, const char *s, char **save_ptr,
               const char *fields, const char *basis, const char *algorithm,
               const char *slave_type, const char *dst,
               const char *slave_delim)
{
    enum ofputil_action_code code;
    struct nx_action_bundle *nab;
    uint16_t n_slaves;

    if (!slave_delim) {
        ovs_fatal(0, "%s: not enough arguments to bundle action", s);
    }

    if (strcasecmp(slave_delim, "slaves")) {
        ovs_fatal(0, "%s: missing slave delimiter, expected `slaves' got `%s'",
                   s, slave_delim);
    }

    code = dst ? OFPUTIL_NXAST_BUNDLE_LOAD : OFPUTIL_NXAST_BUNDLE;
    b->l2 = ofputil_put_action(code, b);

    n_slaves = 0;
    for (;;) {
        ovs_be16 slave_be;
        char *slave;

        slave = strtok_r(NULL, ", ", save_ptr);
        if (!slave || n_slaves >= BUNDLE_MAX_SLAVES) {
            break;
        }

        slave_be = htons(atoi(slave));
        ofpbuf_put(b, &slave_be, sizeof slave_be);

        n_slaves++;
    }

    /* Slaves array must be multiple of 8 bytes long. */
    if (b->size % 8) {
        ofpbuf_put_zeros(b, 8 - (b->size % 8));
    }

    nab = b->l2;
    nab->len = htons(b->size - ((char *) b->l2 - (char *) b->data));
    nab->n_slaves = htons(n_slaves);
    nab->basis = htons(atoi(basis));

    if (!strcasecmp(fields, "eth_src")) {
        nab->fields = htons(NX_HASH_FIELDS_ETH_SRC);
    } else if (!strcasecmp(fields, "symmetric_l4")) {
        nab->fields = htons(NX_HASH_FIELDS_SYMMETRIC_L4);
    } else {
        ovs_fatal(0, "%s: unknown fields `%s'", s, fields);
    }

    if (!strcasecmp(algorithm, "active_backup")) {
        nab->algorithm = htons(NX_BD_ALG_ACTIVE_BACKUP);
    } else if (!strcasecmp(algorithm, "hrw")) {
        nab->algorithm = htons(NX_BD_ALG_HRW);
    } else {
        ovs_fatal(0, "%s: unknown algorithm `%s'", s, algorithm);
    }

    if (!strcasecmp(slave_type, "ofport")) {
        nab->slave_type = htonl(NXM_OF_IN_PORT);
    } else {
        ovs_fatal(0, "%s: unknown slave_type `%s'", s, slave_type);
    }

    if (dst) {
        uint32_t reg;
        int ofs, n_bits;

        nxm_parse_field_bits(dst, &reg, &ofs, &n_bits);

        nab->dst = htonl(reg);
        nab->ofs_nbits = nxm_encode_ofs_nbits(ofs, n_bits);
    }

    b->l2 = NULL;
}

/* Converts a bundle action string contained in 's' to an nx_action_bundle and
 * stores it in 'b'.  Sets 'b''s l2 pointer to NULL. */
void
bundle_parse(struct ofpbuf *b, const char *s)
{
    char *fields, *basis, *algorithm, *slave_type, *slave_delim;
    char *tokstr, *save_ptr;

    save_ptr = NULL;
    tokstr = xstrdup(s);
    fields = strtok_r(tokstr, ", ", &save_ptr);
    basis = strtok_r(NULL, ", ", &save_ptr);
    algorithm = strtok_r(NULL, ", ", &save_ptr);
    slave_type = strtok_r(NULL, ", ", &save_ptr);
    slave_delim = strtok_r(NULL, ": ", &save_ptr);

    bundle_parse__(b, s, &save_ptr, fields, basis, algorithm, slave_type, NULL,
                   slave_delim);
    free(tokstr);
}

/* Converts a bundle_load action string contained in 's' to an nx_action_bundle
 * and stores it in 'b'.  Sets 'b''s l2 pointer to NULL. */
void
bundle_parse_load(struct ofpbuf *b, const char *s)
{
    char *fields, *basis, *algorithm, *slave_type, *dst, *slave_delim;
    char *tokstr, *save_ptr;

    save_ptr = NULL;
    tokstr = xstrdup(s);
    fields = strtok_r(tokstr, ", ", &save_ptr);
    basis = strtok_r(NULL, ", ", &save_ptr);
    algorithm = strtok_r(NULL, ", ", &save_ptr);
    slave_type = strtok_r(NULL, ", ", &save_ptr);
    dst = strtok_r(NULL, ", ", &save_ptr);
    slave_delim = strtok_r(NULL, ": ", &save_ptr);

    bundle_parse__(b, s, &save_ptr, fields, basis, algorithm, slave_type, dst,
                   slave_delim);

    free(tokstr);
}

/* Appends a human-readable representation of 'nab' to 's'. */
void
bundle_format(const struct nx_action_bundle *nab, struct ds *s)
{
    const char *action, *fields, *algorithm, *slave_type;
    size_t i;

    fields = flow_hash_fields_to_str(ntohs(nab->fields));

    switch (ntohs(nab->algorithm)) {
    case NX_BD_ALG_HRW:
        algorithm = "hrw";
        break;
    case NX_BD_ALG_ACTIVE_BACKUP:
        algorithm = "active_backup";
        break;
    default:
        algorithm = "<unknown>";
    }

    switch (ntohl(nab->slave_type)) {
    case NXM_OF_IN_PORT:
        slave_type = "ofport";
        break;
    default:
        slave_type = "<unknown>";
    }

    switch (ntohs(nab->subtype)) {
    case NXAST_BUNDLE:
        action = "bundle";
        break;
    case NXAST_BUNDLE_LOAD:
        action = "bundle_load";
        break;
    default:
        NOT_REACHED();
    }

    ds_put_format(s, "%s(%s,%"PRIu16",%s,%s,", action, fields,
                  ntohs(nab->basis), algorithm, slave_type);

    if (nab->subtype == htons(NXAST_BUNDLE_LOAD)) {
        nxm_format_field_bits(s, ntohl(nab->dst),
                              nxm_decode_ofs(nab->ofs_nbits),
                              nxm_decode_n_bits(nab->ofs_nbits));
        ds_put_cstr(s, ",");
    }

    ds_put_cstr(s, "slaves:");
    for (i = 0; i < ntohs(nab->n_slaves); i++) {
        if (i) {
            ds_put_cstr(s, ",");
        }

        ds_put_format(s, "%"PRIu16, bundle_get_slave(nab, i));
    }

    ds_put_cstr(s, ")");
}
Commit	Line	Data
daff3353 EJ	1	/* Copyright (c) 2011 Nicira Networks.
	2	*
	3	* Licensed under the Apache License, Version 2.0 (the "License");
	4	* you may not use this file except in compliance with the License.
	5	* You may obtain a copy of the License at:
	6	*
	7	* http://www.apache.org/licenses/LICENSE-2.0
	8	*
	9	* Unless required by applicable law or agreed to in writing, software
	10	* distributed under the License is distributed on an "AS IS" BASIS,
	11	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	12	* See the License for the specific language governing permissions and
	13	* limitations under the License.
	14	*/
	15
	16	#include <config.h>
	17
	18	#include "bundle.h"
	19
	20	#include <arpa/inet.h>
	21	#include <inttypes.h>
	22
	23	#include "dynamic-string.h"
	24	#include "multipath.h"
	25	#include "nx-match.h"
	26	#include "ofpbuf.h"
	27	#include "ofp-util.h"
	28	#include "openflow/nicira-ext.h"
	29	#include "vlog.h"
	30
	31	#define BUNDLE_MAX_SLAVES 2048
	32
	33	VLOG_DEFINE_THIS_MODULE(bundle);
	34
04a85497 EJ	35	static uint16_t
	36	execute_ab(const struct nx_action_bundle *nab,
	37	bool (slave_enabled)(uint16_t ofp_port, void aux), void *aux)
	38	{
	39	size_t i;
	40
	41	for (i = 0; i < ntohs(nab->n_slaves); i++) {
	42	uint16_t slave = bundle_get_slave(nab, i);
	43
	44	if (slave_enabled(slave, aux)) {
	45	return slave;
	46	}
	47	}
	48
	49	return OFPP_NONE;
	50	}
	51
	52	static uint16_t
	53	execute_hrw(const struct nx_action_bundle nab, const struct flow flow,
	54	bool (slave_enabled)(uint16_t ofp_port, void aux), void *aux)
daff3353 EJ	55	{
	56	uint32_t flow_hash, best_hash;
	57	int best, i;
	58
daff3353 EJ	59	flow_hash = flow_hash_fields(flow, ntohs(nab->fields), ntohs(nab->basis));
daff3353 EJ	60	best = -1;
481db488	61	best_hash = 0;
daff3353 EJ	62
	63	for (i = 0; i < ntohs(nab->n_slaves); i++) {
	64	if (slave_enabled(bundle_get_slave(nab, i), aux)) {
	65	uint32_t hash = hash_2words(i, flow_hash);
	66
	67	if (best < 0 \|\| hash > best_hash) {
	68	best_hash = hash;
	69	best = i;
	70	}
	71	}
	72	}
	73
	74	return best >= 0 ? bundle_get_slave(nab, best) : OFPP_NONE;
	75	}
	76
04a85497 EJ	77	/* Executes 'nab' on 'flow'. Uses 'slave_enabled' to determine if the slave
	78	* designated by 'ofp_port' is up. Returns the chosen slave, or OFPP_NONE if
	79	* none of the slaves are acceptable. */
	80	uint16_t
	81	bundle_execute(const struct nx_action_bundle nab, const struct flow flow,
	82	bool (slave_enabled)(uint16_t ofp_port, void aux), void *aux)
	83	{
	84	switch (ntohs(nab->algorithm)) {
	85	case NX_BD_ALG_HRW: return execute_hrw(nab, flow, slave_enabled, aux);
	86	case NX_BD_ALG_ACTIVE_BACKUP: return execute_ab(nab, slave_enabled, aux);
	87	default: NOT_REACHED();
	88	}
	89	}
	90
a368bb53 EJ	91	void
	92	bundle_execute_load(const struct nx_action_bundle nab, struct flow flow,
	93	bool (slave_enabled)(uint16_t ofp_port, void aux),
	94	void *aux)
	95	{
	96	nxm_reg_load(nab->dst, nab->ofs_nbits,
	97	bundle_execute(nab, flow, slave_enabled, aux), flow);
	98	}
	99
daff3353 EJ	100	/* Checks that 'nab' specifies a bundle action which is supported by this
	101	* bundle module. Uses the 'max_ports' parameter to validate each port using
	102	* ofputil_check_output_port(). Returns 0 if 'nab' is supported, otherwise an
	103	* OpenFlow error code (as returned by ofp_mkerr()). */
	104	int
a368bb53 EJ	105	bundle_check(const struct nx_action_bundle *nab, int max_ports,
a368bb53 EJ	106	const struct flow *flow)
daff3353 EJ	107	{
daff3353 EJ	108	static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
8815f11c BP	109	uint16_t n_slaves, fields, algorithm, subtype;
8815f11c BP	110	uint32_t slave_type;
daff3353 EJ	111	size_t slaves_size, i;
	112	int error;
	113
	114	subtype = ntohs(nab->subtype);
	115	n_slaves = ntohs(nab->n_slaves);
	116	fields = ntohs(nab->fields);
	117	algorithm = ntohs(nab->algorithm);
8815f11c	118	slave_type = ntohl(nab->slave_type);
daff3353 EJ	119	slaves_size = ntohs(nab->len) - sizeof *nab;
	120
	121	error = ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT);
	122	if (!flow_hash_fields_valid(fields)) {
	123	VLOG_WARN_RL(&rl, "unsupported fields %"PRIu16, fields);
	124	} else if (n_slaves > BUNDLE_MAX_SLAVES) {
	125	VLOG_WARN_RL(&rl, "too may slaves");
04a85497 EJ	126	} else if (algorithm != NX_BD_ALG_HRW
04a85497 EJ	127	&& algorithm != NX_BD_ALG_ACTIVE_BACKUP) {
daff3353 EJ	128	VLOG_WARN_RL(&rl, "unsupported algorithm %"PRIu16, algorithm);
	129	} else if (slave_type != NXM_OF_IN_PORT) {
	130	VLOG_WARN_RL(&rl, "unsupported slave type %"PRIu16, slave_type);
	131	} else {
	132	error = 0;
	133	}
	134
	135	for (i = 0; i < sizeof(nab->zero); i++) {
	136	if (nab->zero[i]) {
	137	VLOG_WARN_RL(&rl, "reserved field is nonzero");
	138	error = ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT);
	139	}
	140	}
	141
a368bb53 EJ	142	if (subtype == NXAST_BUNDLE && (nab->ofs_nbits \|\| nab->dst)) {
	143	VLOG_WARN_RL(&rl, "bundle action has nonzero reserved fields");
	144	error = ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT);
	145	}
	146
	147	if (subtype == NXAST_BUNDLE_LOAD) {
ce523f65 EJ	148	int ofs = nxm_decode_ofs(nab->ofs_nbits);
	149	int n_bits = nxm_decode_n_bits(nab->ofs_nbits);
	150
	151	if (n_bits < 16) {
	152	VLOG_WARN_RL(&rl, "bundle_load action requires at least 16 bit "
	153	"destination.");
	154	error = ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT);
	155	} else {
	156	error = nxm_dst_check(nab->dst, ofs, n_bits, flow) \|\| error;
	157	}
a368bb53 EJ	158	}
a368bb53 EJ	159
daff3353 EJ	160	if (slaves_size < n_slaves * sizeof(ovs_be16)) {
	161	VLOG_WARN_RL(&rl, "Nicira action %"PRIu16" only has %zu bytes "
	162	"allocated for slaves. %zu bytes are required for "
	163	"%"PRIu16" slaves.", subtype, slaves_size,
	164	n_slaves * sizeof(ovs_be16), n_slaves);
	165	error = ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
	166	}
	167
	168	for (i = 0; i < n_slaves; i++) {
	169	uint16_t ofp_port = bundle_get_slave(nab, i);
	170	int ofputil_error = ofputil_check_output_port(ofp_port, max_ports);
	171
	172	if (ofputil_error) {
	173	VLOG_WARN_RL(&rl, "invalid slave %"PRIu16, ofp_port);
	174	error = ofputil_error;
	175	}
	176
	177	/* Controller slaves are unsupported due to the lack of a max_len
	178	* argument. This may or may not change in the future. There doesn't
	179	* seem to be a real-world use-case for supporting it. */
	180	if (ofp_port == OFPP_CONTROLLER) {
	181	VLOG_WARN_RL(&rl, "unsupported controller slave");
	182	error = ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_OUT_PORT);
	183	}
	184	}
	185
	186	return error;
	187	}
	188
a368bb53 EJ	189	/* Helper for bundle_parse and bundle_parse_load. */
	190	static void
	191	bundle_parse__(struct ofpbuf b, const char s, char **save_ptr,
	192	const char fields, const char basis, const char *algorithm,
	193	const char slave_type, const char dst,
	194	const char *slave_delim)
daff3353	195	{
93996add	196	enum ofputil_action_code code;
daff3353	197	struct nx_action_bundle *nab;
daff3353 EJ	198	uint16_t n_slaves;
daff3353 EJ	199
daff3353 EJ	200	if (!slave_delim) {
	201	ovs_fatal(0, "%s: not enough arguments to bundle action", s);
	202	}
	203
	204	if (strcasecmp(slave_delim, "slaves")) {
	205	ovs_fatal(0, "%s: missing slave delimiter, expected `slaves' got `%s'",
	206	s, slave_delim);
	207	}
	208
93996add BP	209	code = dst ? OFPUTIL_NXAST_BUNDLE_LOAD : OFPUTIL_NXAST_BUNDLE;
93996add BP	210	b->l2 = ofputil_put_action(code, b);
daff3353 EJ	211
	212	n_slaves = 0;
	213	for (;;) {
	214	ovs_be16 slave_be;
	215	char *slave;
	216
a368bb53	217	slave = strtok_r(NULL, ", ", save_ptr);
daff3353 EJ	218	if (!slave \|\| n_slaves >= BUNDLE_MAX_SLAVES) {
	219	break;
	220	}
	221
	222	slave_be = htons(atoi(slave));
	223	ofpbuf_put(b, &slave_be, sizeof slave_be);
	224
	225	n_slaves++;
	226	}
	227
	228	/* Slaves array must be multiple of 8 bytes long. */
	229	if (b->size % 8) {
	230	ofpbuf_put_zeros(b, 8 - (b->size % 8));
	231	}
	232
	233	nab = b->l2;
daff3353	234	nab->len = htons(b->size - ((char ) b->l2 - (char ) b->data));
daff3353 EJ	235	nab->n_slaves = htons(n_slaves);
	236	nab->basis = htons(atoi(basis));
	237
	238	if (!strcasecmp(fields, "eth_src")) {
	239	nab->fields = htons(NX_HASH_FIELDS_ETH_SRC);
	240	} else if (!strcasecmp(fields, "symmetric_l4")) {
	241	nab->fields = htons(NX_HASH_FIELDS_SYMMETRIC_L4);
	242	} else {
	243	ovs_fatal(0, "%s: unknown fields `%s'", s, fields);
	244	}
	245
	246	if (!strcasecmp(algorithm, "active_backup")) {
	247	nab->algorithm = htons(NX_BD_ALG_ACTIVE_BACKUP);
	248	} else if (!strcasecmp(algorithm, "hrw")) {
	249	nab->algorithm = htons(NX_BD_ALG_HRW);
	250	} else {
	251	ovs_fatal(0, "%s: unknown algorithm `%s'", s, algorithm);
	252	}
	253
	254	if (!strcasecmp(slave_type, "ofport")) {
8815f11c	255	nab->slave_type = htonl(NXM_OF_IN_PORT);
daff3353 EJ	256	} else {
	257	ovs_fatal(0, "%s: unknown slave_type `%s'", s, slave_type);
	258	}
	259
a368bb53 EJ	260	if (dst) {
	261	uint32_t reg;
	262	int ofs, n_bits;
	263
	264	nxm_parse_field_bits(dst, &reg, &ofs, &n_bits);
	265
	266	nab->dst = htonl(reg);
	267	nab->ofs_nbits = nxm_encode_ofs_nbits(ofs, n_bits);
	268	}
	269
daff3353	270	b->l2 = NULL;
a368bb53 EJ	271	}
	272
	273	/* Converts a bundle action string contained in 's' to an nx_action_bundle and
	274	* stores it in 'b'. Sets 'b''s l2 pointer to NULL. */
	275	void
	276	bundle_parse(struct ofpbuf b, const char s)
	277	{
	278	char fields, basis, algorithm, slave_type, *slave_delim;
	279	char tokstr, save_ptr;
	280
	281	save_ptr = NULL;
	282	tokstr = xstrdup(s);
	283	fields = strtok_r(tokstr, ", ", &save_ptr);
	284	basis = strtok_r(NULL, ", ", &save_ptr);
	285	algorithm = strtok_r(NULL, ", ", &save_ptr);
	286	slave_type = strtok_r(NULL, ", ", &save_ptr);
	287	slave_delim = strtok_r(NULL, ": ", &save_ptr);
	288
	289	bundle_parse__(b, s, &save_ptr, fields, basis, algorithm, slave_type, NULL,
	290	slave_delim);
	291	free(tokstr);
	292	}
	293
	294	/* Converts a bundle_load action string contained in 's' to an nx_action_bundle
	295	* and stores it in 'b'. Sets 'b''s l2 pointer to NULL. */
	296	void
	297	bundle_parse_load(struct ofpbuf b, const char s)
	298	{
	299	char fields, basis, algorithm, slave_type, dst, slave_delim;
	300	char tokstr, save_ptr;
	301
	302	save_ptr = NULL;
	303	tokstr = xstrdup(s);
	304	fields = strtok_r(tokstr, ", ", &save_ptr);
	305	basis = strtok_r(NULL, ", ", &save_ptr);
	306	algorithm = strtok_r(NULL, ", ", &save_ptr);
	307	slave_type = strtok_r(NULL, ", ", &save_ptr);
	308	dst = strtok_r(NULL, ", ", &save_ptr);
	309	slave_delim = strtok_r(NULL, ": ", &save_ptr);
	310
	311	bundle_parse__(b, s, &save_ptr, fields, basis, algorithm, slave_type, dst,
	312	slave_delim);
	313
daff3353 EJ	314	free(tokstr);
	315	}
	316
	317	/* Appends a human-readable representation of 'nab' to 's'. */
	318	void
	319	bundle_format(const struct nx_action_bundle nab, struct ds s)
	320	{
a368bb53	321	const char action, fields, algorithm, slave_type;
daff3353 EJ	322	size_t i;
	323
	324	fields = flow_hash_fields_to_str(ntohs(nab->fields));
	325
	326	switch (ntohs(nab->algorithm)) {
	327	case NX_BD_ALG_HRW:
	328	algorithm = "hrw";
	329	break;
	330	case NX_BD_ALG_ACTIVE_BACKUP:
	331	algorithm = "active_backup";
	332	break;
	333	default:
	334	algorithm = "<unknown>";
	335	}
	336
8815f11c	337	switch (ntohl(nab->slave_type)) {
daff3353 EJ	338	case NXM_OF_IN_PORT:
	339	slave_type = "ofport";
	340	break;
	341	default:
	342	slave_type = "<unknown>";
	343	}
	344
a368bb53 EJ	345	switch (ntohs(nab->subtype)) {
	346	case NXAST_BUNDLE:
	347	action = "bundle";
	348	break;
	349	case NXAST_BUNDLE_LOAD:
	350	action = "bundle_load";
	351	break;
	352	default:
	353	NOT_REACHED();
	354	}
	355
	356	ds_put_format(s, "%s(%s,%"PRIu16",%s,%s,", action, fields,
daff3353 EJ	357	ntohs(nab->basis), algorithm, slave_type);
daff3353 EJ	358
a368bb53 EJ	359	if (nab->subtype == htons(NXAST_BUNDLE_LOAD)) {
	360	nxm_format_field_bits(s, ntohl(nab->dst),
	361	nxm_decode_ofs(nab->ofs_nbits),
	362	nxm_decode_n_bits(nab->ofs_nbits));
	363	ds_put_cstr(s, ",");
	364	}
	365
	366	ds_put_cstr(s, "slaves:");
daff3353 EJ	367	for (i = 0; i < ntohs(nab->n_slaves); i++) {
	368	if (i) {
	369	ds_put_cstr(s, ",");
	370	}
	371
	372	ds_put_format(s, "%"PRIu16, bundle_get_slave(nab, i));
	373	}
	374
	375	ds_put_cstr(s, ")");
	376	}