/*
- * Copyright (c) 2011, 2012 Nicira Networks.
+ * Copyright (c) 2011, 2012 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
cls_rule_init_catchall(&rule, 0);
if (learn->flags & ~htons(OFPFF_SEND_FLOW_REM)
- || !is_all_zeros(learn->pad, sizeof learn->pad)
+ || learn->pad
|| learn->table_id == 0xff) {
return OFPERR_OFPBAC_BAD_ARGUMENT;
}
if (dst_type == NX_LEARN_DST_MATCH
&& src_type == NX_LEARN_SRC_IMMEDIATE) {
- mf_set_subfield(&dst, value, &rule);
+ if (n_bits <= 64) {
+ mf_set_subfield(&dst, value, &rule);
+ } else {
+ /* We're only setting subfields to allow us to check
+ * prerequisites. No prerequisite depends on the value of
+ * a field that is wider than 64 bits. So just skip
+ * setting it entirely. */
+ BUILD_ASSERT_DECL(FLOW_WC_SEQ == 10);
+ }
}
}
}
struct ofpbuf actions;
cls_rule_init_catchall(&fm->cr, ntohs(learn->priority));
- fm->cookie = learn->cookie;
+ fm->cookie = htonll(0);
+ fm->cookie_mask = htonll(0);
+ fm->new_cookie = learn->cookie;
fm->table_id = learn->table_id;
fm->command = OFPFC_MODIFY_STRICT;
fm->idle_timeout = ntohs(learn->idle_timeout);
ofpbuf_init(&actions, 64);
+ if (learn->fin_idle_timeout || learn->fin_hard_timeout) {
+ struct nx_action_fin_timeout *naft;
+
+ naft = ofputil_put_NXAST_FIN_TIMEOUT(&actions);
+ naft->fin_idle_timeout = learn->fin_idle_timeout;
+ naft->fin_hard_timeout = learn->fin_hard_timeout;
+ }
+
for (p = learn + 1, end = (char *) learn + ntohs(learn->len); p != end; ) {
uint16_t header = ntohs(get_be16(&p));
int n_bits = header & NX_LEARN_N_BITS_MASK;
int src_type = header & NX_LEARN_SRC_MASK;
int dst_type = header & NX_LEARN_DST_MASK;
- uint64_t value;
+ union mf_subvalue value;
- struct nx_action_reg_load *load;
struct mf_subfield dst;
+ int chunk, ofs;
if (!header) {
break;
struct mf_subfield src;
get_subfield(n_bits, &p, &src);
- value = mf_get_subfield(&src, flow);
+ mf_read_subfield(&src, flow, &value);
} else {
- value = get_bits(n_bits, &p);
+ int p_bytes = 2 * DIV_ROUND_UP(n_bits, 16);
+
+ memset(&value, 0, sizeof value);
+ bitwise_copy(p, p_bytes, 0,
+ &value, sizeof value, 0,
+ n_bits);
+ p = (const uint8_t *) p + p_bytes;
}
switch (dst_type) {
case NX_LEARN_DST_MATCH:
get_subfield(n_bits, &p, &dst);
- mf_set_subfield(&dst, value, &fm->cr);
+ mf_write_subfield(&dst, &value, &fm->cr);
break;
case NX_LEARN_DST_LOAD:
get_subfield(n_bits, &p, &dst);
- load = ofputil_put_NXAST_REG_LOAD(&actions);
- load->ofs_nbits = nxm_encode_ofs_nbits(dst.ofs, dst.n_bits);
- load->dst = htonl(dst.field->nxm_header);
- load->value = htonll(value);
+ for (ofs = 0; ofs < n_bits; ofs += chunk) {
+ struct nx_action_reg_load *load;
+
+ chunk = MIN(n_bits - ofs, 64);
+
+ load = ofputil_put_NXAST_REG_LOAD(&actions);
+ load->ofs_nbits = nxm_encode_ofs_nbits(dst.ofs + ofs, chunk);
+ load->dst = htonl(dst.field->nxm_header);
+ bitwise_copy(&value, sizeof value, ofs,
+ &load->value, sizeof load->value, 0,
+ chunk);
+ }
break;
case NX_LEARN_DST_OUTPUT:
- ofputil_put_OFPAT_OUTPUT(&actions)->port = htons(value);
+ if (n_bits <= 16 || is_all_zeros(value.u8, sizeof value - 2)) {
+ ofputil_put_OFPAT10_OUTPUT(&actions)->port = value.be16[7];
+ }
break;
}
}
int src_type;
struct mf_subfield src;
- uint8_t src_imm[sizeof(union mf_value)];
+ union mf_subvalue src_imm;
int dst_type;
struct mf_subfield dst;
};
+static void
+learn_parse_load_immediate(const char *s, struct learn_spec *spec)
+{
+ const char *full_s = s;
+ const char *arrow = strstr(s, "->");
+ struct mf_subfield dst;
+ union mf_subvalue imm;
+
+ memset(&imm, 0, sizeof imm);
+ if (s[0] == '0' && (s[1] == 'x' || s[1] == 'X') && arrow) {
+ const char *in = arrow - 1;
+ uint8_t *out = imm.u8 + sizeof imm.u8 - 1;
+ int n = arrow - (s + 2);
+ int i;
+
+ for (i = 0; i < n; i++) {
+ int hexit = hexit_value(in[-i]);
+ if (hexit < 0) {
+ ovs_fatal(0, "%s: bad hex digit in value", full_s);
+ }
+ out[-(i / 2)] |= i % 2 ? hexit << 4 : hexit;
+ }
+ s = arrow;
+ } else {
+ imm.be64[1] = htonll(strtoull(s, (char **) &s, 0));
+ }
+
+ if (strncmp(s, "->", 2)) {
+ ovs_fatal(0, "%s: missing `->' following value", full_s);
+ }
+ s += 2;
+
+ s = mf_parse_subfield(&dst, s);
+ if (*s != '\0') {
+ ovs_fatal(0, "%s: trailing garbage following destination", full_s);
+ }
+
+ if (!bitwise_is_all_zeros(&imm, sizeof imm, dst.n_bits,
+ (8 * sizeof imm) - dst.n_bits)) {
+ ovs_fatal(0, "%s: value does not fit into %u bits",
+ full_s, dst.n_bits);
+ }
+
+ spec->n_bits = dst.n_bits;
+ spec->src_type = NX_LEARN_SRC_IMMEDIATE;
+ spec->src_imm = imm;
+ spec->dst_type = NX_LEARN_DST_LOAD;
+ spec->dst = dst;
+}
+
static void
learn_parse_spec(const char *orig, char *name, char *value,
struct learn_spec *spec)
spec->n_bits = dst->n_bits;
spec->src_type = NX_LEARN_SRC_IMMEDIATE;
- memcpy(spec->src_imm, &imm, dst->n_bytes);
+ memset(&spec->src_imm, 0, sizeof spec->src_imm);
+ memcpy(&spec->src_imm.u8[sizeof spec->src_imm - dst->n_bytes],
+ &imm, dst->n_bytes);
spec->dst_type = NX_LEARN_DST_MATCH;
spec->dst.field = dst;
spec->dst.ofs = 0;
spec->dst_type = NX_LEARN_DST_MATCH;
} else if (!strcmp(name, "load")) {
if (value[strcspn(value, "[-")] == '-') {
- struct nx_action_reg_load load;
- int nbits, imm_bytes;
- uint64_t imm;
- int i;
-
- nxm_parse_reg_load(&load, value);
- nbits = nxm_decode_n_bits(load.ofs_nbits);
- imm_bytes = DIV_ROUND_UP(nbits, 8);
- imm = ntohll(load.value);
-
- spec->n_bits = nbits;
- spec->src_type = NX_LEARN_SRC_IMMEDIATE;
- for (i = 0; i < imm_bytes; i++) {
- spec->src_imm[i] = imm >> ((imm_bytes - i - 1) * 8);
- }
- spec->dst_type = NX_LEARN_DST_LOAD;
- nxm_decode(&spec->dst, load.dst, load.ofs_nbits);
+ learn_parse_load_immediate(value, spec);
} else {
struct nx_action_reg_move move;
}
}
+/* Parses 'arg' as a set of arguments to the "learn" action and appends a
+ * matching NXAST_LEARN action to 'b'. The format parsed is described in
+ * ovs-ofctl(8).
+ *
+ * Prints an error on stderr and aborts the program if 'arg' syntax is invalid.
+ *
+ * If 'flow' is nonnull, then it should be the flow from a cls_rule that is
+ * the matching rule for the learning action. This helps to better validate
+ * the action's arguments.
+ *
+ * Modifies 'arg'. */
void
learn_parse(struct ofpbuf *b, char *arg, const struct flow *flow)
{
learn->idle_timeout = htons(atoi(value));
} else if (!strcmp(name, "hard_timeout")) {
learn->hard_timeout = htons(atoi(value));
+ } else if (!strcmp(name, "fin_idle_timeout")) {
+ learn->fin_idle_timeout = htons(atoi(value));
+ } else if (!strcmp(name, "fin_hard_timeout")) {
+ learn->fin_hard_timeout = htons(atoi(value));
} else if (!strcmp(name, "cookie")) {
learn->cookie = htonll(strtoull(value, NULL, 0));
} else {
/* Check prerequisites. */
if (spec.src_type == NX_LEARN_SRC_FIELD
- && !mf_are_prereqs_ok(spec.src.field, flow)) {
+ && flow && !mf_are_prereqs_ok(spec.src.field, flow)) {
ovs_fatal(0, "%s: cannot specify source field %s because "
"prerequisites are not satisfied",
orig, spec.src.field->name);
/* Update 'rule' to allow for satisfying destination
* prerequisites. */
if (spec.src_type == NX_LEARN_SRC_IMMEDIATE
- && spec.dst_type == NX_LEARN_DST_MATCH
- && spec.dst.ofs == 0
- && spec.n_bits == spec.dst.field->n_bytes * 8) {
- union mf_value imm;
-
- memcpy(&imm, spec.src_imm, spec.dst.field->n_bytes);
- mf_set_value(spec.dst.field, &imm, &rule);
+ && spec.dst_type == NX_LEARN_DST_MATCH) {
+ mf_write_subfield(&spec.dst, &spec.src_imm, &rule);
}
/* Output the flow_mod_spec. */
put_u16(b, spec.n_bits | spec.src_type | spec.dst_type);
if (spec.src_type == NX_LEARN_SRC_IMMEDIATE) {
- int n_bytes = DIV_ROUND_UP(spec.n_bits, 8);
- if (n_bytes % 2) {
- ofpbuf_put_zeros(b, 1);
- }
- ofpbuf_put(b, spec.src_imm, n_bytes);
+ int n_bytes = DIV_ROUND_UP(spec.n_bits, 16) * 2;
+ int ofs = sizeof spec.src_imm - n_bytes;
+ ofpbuf_put(b, &spec.src_imm.u8[ofs], n_bytes);
} else {
put_u32(b, spec.src.field->nxm_header);
put_u16(b, spec.src.ofs);
learn->len = htons(b->size - learn_ofs);
/* In theory the above should have caught any errors, but... */
- error = learn_check(learn, flow);
- if (error) {
- ovs_fatal(0, "%s: %s", orig, ofperr_to_string(error));
+ if (flow) {
+ error = learn_check(learn, flow);
+ if (error) {
+ ovs_fatal(0, "%s: %s", orig, ofperr_to_string(error));
+ }
}
free(orig);
}
if (learn->hard_timeout != htons(OFP_FLOW_PERMANENT)) {
ds_put_format(s, ",hard_timeout=%"PRIu16, ntohs(learn->hard_timeout));
}
+ if (learn->fin_idle_timeout) {
+ ds_put_format(s, ",fin_idle_timeout=%"PRIu16,
+ ntohs(learn->fin_idle_timeout));
+ }
+ if (learn->fin_hard_timeout) {
+ ds_put_format(s, ",fin_hard_timeout=%"PRIu16,
+ ntohs(learn->fin_hard_timeout));
+ }
if (learn->priority != htons(OFP_DEFAULT_PRIORITY)) {
ds_put_format(s, ",priority=%"PRIu16, ntohs(learn->priority));
}
if (learn->cookie != htonll(0)) {
ds_put_format(s, ",cookie=0x%"PRIx64, ntohll(learn->cookie));
}
- if (!is_all_zeros(learn->pad, sizeof learn->pad)) {
+ if (learn->pad != 0) {
ds_put_cstr(s, ",***nonzero pad***");
}
git://git.onelab.eu / sliver-openvswitch.git / blobdiff