/*
- * Copyright (c) 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
+ * Copyright (c) 2010, 2011, 2012, 2013, 2014, 2015 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#include "shash.h"
#include "unaligned.h"
#include "util.h"
-#include "vlog.h"
+#include "openvswitch/vlog.h"
VLOG_DEFINE_THIS_MODULE(nx_match);
static int nxm_field(uint64_t header) { return (header >> 41) & 0x7f; }
static bool nxm_hasmask(uint64_t header) { return (header >> 40) & 1; }
static int nxm_length(uint64_t header) { return (header >> 32) & 0xff; }
+static uint64_t nxm_no_len(uint64_t header) { return header & 0xffffff80ffffffffULL; }
static bool
is_experimenter_oxm(uint64_t header)
enum ofp_version);
static void nx_put_header__(struct ofpbuf *, uint64_t header, bool masked);
+static void nx_put_header_len(struct ofpbuf *, enum mf_field_id field,
+ enum ofp_version version, bool masked,
+ size_t n_bytes);
/* Rate limit for nx_match parse errors. These always indicate a bug in the
* peer and so there's not much point in showing a lot of them. */
nx_pull_header__(struct ofpbuf *b, bool allow_cookie, uint64_t *header,
const struct mf_field **field)
{
- if (ofpbuf_size(b) < 4) {
+ if (b->size < 4) {
goto bad_len;
}
- *header = ((uint64_t) ntohl(get_unaligned_be32(ofpbuf_data(b)))) << 32;
+ *header = ((uint64_t) ntohl(get_unaligned_be32(b->data))) << 32;
if (is_experimenter_oxm(*header)) {
- if (ofpbuf_size(b) < 8) {
+ if (b->size < 8) {
goto bad_len;
}
- *header = ntohll(get_unaligned_be64(ofpbuf_data(b)));
+ *header = ntohll(get_unaligned_be64(b->data));
}
if (nxm_length(*header) <= nxm_experimenter_len(*header)) {
VLOG_WARN_RL(&rl, "OXM header "NXM_HEADER_FMT" has invalid length %d "
bad_len:
VLOG_DBG_RL(&rl, "encountered partial (%"PRIu32"-byte) OXM entry",
- ofpbuf_size(b));
+ b->size);
error:
*header = 0;
- *field = NULL;
+ if (field) {
+ *field = NULL;
+ }
return OFPERR_OFPBMC_BAD_LEN;
}
+static void
+copy_entry_value(const struct mf_field *field, union mf_value *value,
+ const uint8_t *payload, int width)
+{
+ int copy_len;
+ void *copy_dst;
+
+ copy_dst = value;
+ copy_len = MIN(width, field ? field->n_bytes : sizeof *value);
+
+ if (field && field->variable_len) {
+ memset(value, 0, field->n_bytes);
+ copy_dst = &value->u8 + field->n_bytes - copy_len;
+ }
+
+ memcpy(copy_dst, payload, copy_len);
+}
+
static enum ofperr
nx_pull_entry__(struct ofpbuf *b, bool allow_cookie, uint64_t *header,
- const struct mf_field **field,
+ const struct mf_field **field_,
union mf_value *value, union mf_value *mask)
{
+ const struct mf_field *field;
enum ofperr header_error;
unsigned int payload_len;
const uint8_t *payload;
int width;
- header_error = nx_pull_header__(b, allow_cookie, header, field);
+ header_error = nx_pull_header__(b, allow_cookie, header, &field);
if (header_error && header_error != OFPERR_OFPBMC_BAD_FIELD) {
return header_error;
}
if (!payload) {
VLOG_DBG_RL(&rl, "OXM header "NXM_HEADER_FMT" calls for %u-byte "
"payload but only %"PRIu32" bytes follow OXM header",
- NXM_HEADER_ARGS(*header), payload_len, ofpbuf_size(b));
+ NXM_HEADER_ARGS(*header), payload_len, b->size);
return OFPERR_OFPBMC_BAD_LEN;
}
return OFPERR_OFPBMC_BAD_WILDCARDS;
}
- memcpy(value, payload, MIN(width, sizeof *value));
+ copy_entry_value(field, value, payload, width);
+
if (mask) {
if (nxm_hasmask(*header)) {
- memcpy(mask, payload + width, MIN(width, sizeof *mask));
+ copy_entry_value(field, mask, payload + width, width);
} else {
- memset(mask, 0xff, MIN(width, sizeof *mask));
+ memset(mask, 0xff, sizeof *mask);
}
} else if (nxm_hasmask(*header)) {
VLOG_DBG_RL(&rl, "OXM header "NXM_HEADER_FMT" includes mask but "
return OFPERR_OFPBMC_BAD_MASK;
}
- return header_error;
+ if (field_) {
+ *field_ = field;
+ return header_error;
+ }
+
+ return 0;
}
/* Attempts to pull an NXM or OXM header, value, and mask (if present) from the
}
ofpbuf_use_const(&b, p, match_len);
- while (ofpbuf_size(&b)) {
- const uint8_t *pos = ofpbuf_data(&b);
+ while (b.size) {
+ const uint8_t *pos = b.data;
const struct mf_field *field;
union mf_value value;
union mf_value mask;
if (!p) {
VLOG_DBG_RL(&rl, "nx_match length %u, rounded up to a "
"multiple of 8, is longer than space in message (max "
- "length %"PRIu32")", match_len, ofpbuf_size(b));
+ "length %"PRIu32")", match_len, b->size);
return OFPERR_OFPBMC_BAD_LEN;
}
}
static enum ofperr
oxm_pull_match__(struct ofpbuf *b, bool strict, struct match *match)
{
- struct ofp11_match_header *omh = ofpbuf_data(b);
+ struct ofp11_match_header *omh = b->data;
uint8_t *p;
uint16_t match_len;
- if (ofpbuf_size(b) < sizeof *omh) {
+ if (b->size < sizeof *omh) {
return OFPERR_OFPBMC_BAD_LEN;
}
if (!p) {
VLOG_DBG_RL(&rl, "oxm length %u, rounded up to a "
"multiple of 8, is longer than space in message (max "
- "length %"PRIu32")", match_len, ofpbuf_size(b));
+ "length %"PRIu32")", match_len, b->size);
return OFPERR_OFPBMC_BAD_LEN;
}
{
return oxm_pull_match__(b, false, match);
}
+
+/* Verify an array of OXM TLVs treating value of each TLV as a mask,
+ * disallowing masks in each TLV and ignoring pre-requisites. */
+enum ofperr
+oxm_pull_field_array(const void *fields_data, size_t fields_len,
+ struct field_array *fa)
+{
+ struct ofpbuf b;
+
+ ofpbuf_use_const(&b, fields_data, fields_len);
+ while (b.size) {
+ const uint8_t *pos = b.data;
+ const struct mf_field *field;
+ union mf_value value;
+ enum ofperr error;
+ uint64_t header;
+
+ error = nx_pull_entry__(&b, false, &header, &field, &value, NULL);
+ if (error) {
+ VLOG_DBG_RL(&rl, "error pulling field array field");
+ return error;
+ } else if (!field) {
+ VLOG_DBG_RL(&rl, "unknown field array field");
+ error = OFPERR_OFPBMC_BAD_FIELD;
+ } else if (bitmap_is_set(fa->used.bm, field->id)) {
+ VLOG_DBG_RL(&rl, "duplicate field array field '%s'", field->name);
+ error = OFPERR_OFPBMC_DUP_FIELD;
+ } else if (!mf_is_mask_valid(field, &value)) {
+ VLOG_DBG_RL(&rl, "bad mask in field array field '%s'", field->name);
+ return OFPERR_OFPBMC_BAD_MASK;
+ } else {
+ field_array_set(field->id, &value, fa);
+ }
+
+ if (error) {
+ const uint8_t *start = fields_data;
+
+ VLOG_DBG_RL(&rl, "error parsing OXM at offset %"PRIdPTR" "
+ "within field array (%s)", pos - start,
+ ofperr_to_string(error));
+ return error;
+ }
+ }
+
+ return 0;
+}
\f
/* nx_put_match() and helpers.
*
nxm_put_unmasked(struct ofpbuf *b, enum mf_field_id field,
enum ofp_version version, const void *value, size_t n_bytes)
{
- nx_put_header(b, field, version, false);
+ nx_put_header_len(b, field, version, false, n_bytes);
ofpbuf_put(b, value, n_bytes);
}
{
if (!is_all_zeros(mask, n_bytes)) {
bool masked = !is_all_ones(mask, n_bytes);
- nx_put_header(b, field, version, masked);
+ nx_put_header_len(b, field, version, masked, n_bytes);
ofpbuf_put(b, value, n_bytes);
if (masked) {
ofpbuf_put(b, mask, n_bytes);
ovs_be64 cookie, ovs_be64 cookie_mask)
{
const struct flow *flow = &match->flow;
- const size_t start_len = ofpbuf_size(b);
+ const size_t start_len = b->size;
int match_len;
int i;
- BUILD_ASSERT_DECL(FLOW_WC_SEQ == 28);
+ BUILD_ASSERT_DECL(FLOW_WC_SEQ == 31);
/* Metadata. */
if (match->wc.masks.dp_hash) {
nxm_put_32(b, MFF_RECIRC_ID, oxm, htonl(flow->recirc_id));
}
+ if (match->wc.masks.conj_id) {
+ nxm_put_32(b, MFF_CONJ_ID, oxm, htonl(flow->conj_id));
+ }
+
if (match->wc.masks.in_port.ofp_port) {
ofp_port_t in_port = flow->in_port.ofp_port;
if (oxm) {
flow->tunnel.ip_src, match->wc.masks.tunnel.ip_src);
nxm_put_32m(b, MFF_TUN_DST, oxm,
flow->tunnel.ip_dst, match->wc.masks.tunnel.ip_dst);
+ nxm_put_16m(b, MFF_TUN_GBP_ID, oxm,
+ flow->tunnel.gbp_id, match->wc.masks.tunnel.gbp_id);
+ nxm_put_8m(b, MFF_TUN_GBP_FLAGS, oxm,
+ flow->tunnel.gbp_flags, match->wc.masks.tunnel.gbp_flags);
/* Registers. */
if (oxm < OFP15_VERSION) {
}
}
- match_len = ofpbuf_size(b) - start_len;
+ match_len = b->size - start_len;
return match_len;
}
{
int match_len;
struct ofp11_match_header *omh;
- size_t start_len = ofpbuf_size(b);
+ size_t start_len = b->size;
ovs_be64 cookie = htonll(0), cookie_mask = htonll(0);
ofpbuf_put_uninit(b, sizeof *omh);
return match_len;
}
+/* Appends to 'b' the nx_match format that expresses the tlv corresponding
+ * to 'id'. If mask is not all-ones then it is also formated as the value
+ * of the tlv. */
+static void
+nx_format_mask_tlv(struct ds *ds, enum mf_field_id id,
+ const union mf_value *mask)
+{
+ const struct mf_field *mf = mf_from_id(id);
+
+ ds_put_format(ds, "%s", mf->name);
+
+ if (!is_all_ones(mask, mf->n_bytes)) {
+ ds_put_char(ds, '=');
+ mf_format(mf, mask, NULL, ds);
+ }
+
+ ds_put_char(ds, ',');
+}
+
+/* Appends a string representation of 'fa_' to 'ds'.
+ * The TLVS value of 'fa_' is treated as a mask and
+ * only the name of fields is formated if it is all ones. */
+void
+oxm_format_field_array(struct ds *ds, const struct field_array *fa)
+{
+ size_t start_len = ds->length;
+ int i;
+
+ for (i = 0; i < MFF_N_IDS; i++) {
+ if (bitmap_is_set(fa->used.bm, i)) {
+ nx_format_mask_tlv(ds, i, &fa->value[i]);
+ }
+ }
+
+ if (ds->length > start_len) {
+ ds_chomp(ds, ',');
+ }
+}
+
+/* Appends to 'b' a series of OXM TLVs corresponding to the series
+ * of enum mf_field_id and value tuples in 'fa_'.
+ *
+ * OXM differs slightly among versions of OpenFlow. Specify the OpenFlow
+ * version in use as 'version'.
+ *
+ * This function can cause 'b''s data to be reallocated.
+ *
+ * Returns the number of bytes appended to 'b'. May return zero. */
+int
+oxm_put_field_array(struct ofpbuf *b, const struct field_array *fa,
+ enum ofp_version version)
+{
+ size_t start_len = b->size;
+ int i;
+
+ /* Field arrays are only used with the group selection method
+ * property and group properties are only available in OpenFlow 1.5+.
+ * So the following assertion should never fail.
+ *
+ * If support for older OpenFlow versions is desired then some care
+ * will need to be taken of different TLVs that handle the same
+ * flow fields. In particular:
+ * - VLAN_TCI, VLAN_VID and MFF_VLAN_PCP
+ * - IP_DSCP_MASK and DSCP_SHIFTED
+ * - REGS and XREGS
+ */
+ ovs_assert(version >= OFP15_VERSION);
+
+ for (i = 0; i < MFF_N_IDS; i++) {
+ if (bitmap_is_set(fa->used.bm, i)) {
+ nxm_put_unmasked(b, i, version, &fa->value[i],
+ mf_from_id(i)->n_bytes);
+ }
+ }
+
+ return b->size - start_len;
+}
+
static void
nx_put_header__(struct ofpbuf *b, uint64_t header, bool masked)
{
nx_put_header__(b, mf_oxm_header(field, version), masked);
}
+static void
+nx_put_header_len(struct ofpbuf *b, enum mf_field_id field,
+ enum ofp_version version, bool masked, size_t n_bytes)
+{
+ uint64_t header = mf_oxm_header(field, version);
+
+ header = NXM_HEADER(nxm_vendor(header), nxm_class(header),
+ nxm_field(header), false,
+ nxm_experimenter_len(header) + n_bytes);
+
+ nx_put_header__(b, header, masked);
+}
+
void
nx_put_entry(struct ofpbuf *b,
enum mf_field_id field, enum ofp_version version,
ofpbuf_use_const(&b, p, match_len);
ds_init(&s);
- while (ofpbuf_size(&b)) {
+ while (b.size) {
union mf_value value;
union mf_value mask;
enum ofperr error;
ds_put_char(&s, ')');
}
- if (ofpbuf_size(&b)) {
+ if (b.size) {
if (s.length) {
ds_put_cstr(&s, ", ");
}
- ds_put_format(&s, "<%u invalid bytes>", ofpbuf_size(&b));
+ ds_put_format(&s, "<%u invalid bytes>", b.size);
}
return ds_steal_cstr(&s);
char *
oxm_match_to_string(const struct ofpbuf *p, unsigned int match_len)
{
- const struct ofp11_match_header *omh = ofpbuf_data(p);
+ const struct ofp11_match_header *omh = p->data;
uint16_t match_len_;
struct ds s;
nx_match_from_string_raw(const char *s, struct ofpbuf *b)
{
const char *full_s = s;
- const size_t start_len = ofpbuf_size(b);
+ const size_t start_len = b->size;
if (!strcmp(s, "<any>")) {
- /* Ensure that 'ofpbuf_data(b)' isn't actually null. */
+ /* Ensure that 'b->data' isn't actually null. */
ofpbuf_prealloc_tailroom(b, 1);
return 0;
}
s++;
}
- return ofpbuf_size(b) - start_len;
+ return b->size - start_len;
}
int
{
int match_len;
struct ofp11_match_header *omh;
- size_t start_len = ofpbuf_size(b);
+ size_t start_len = b->size;
ofpbuf_put_uninit(b, sizeof *omh);
match_len = nx_match_from_string_raw(s, b) + sizeof *omh;
*
* Returns NULL if successful, otherwise a malloc()'d string describing the
* error. The caller is responsible for freeing the returned string. */
-char * WARN_UNUSED_RESULT
+char * OVS_WARN_UNUSED_RESULT
nxm_parse_reg_move(struct ofpact_reg_move *move, const char *s)
{
const char *full_s = s;
*
* Returns NULL if successful, otherwise a malloc()'d string describing the
* error. The caller is responsible for freeing the returned string. */
-char * WARN_UNUSED_RESULT
+char * OVS_WARN_UNUSED_RESULT
nxm_parse_stack_action(struct ofpact_stack *stack_action, const char *s)
{
char *error;
{
union mf_subvalue *v = NULL;
- if (ofpbuf_size(stack)) {
+ if (stack->size) {
- ofpbuf_set_size(stack, ofpbuf_size(stack) - sizeof *v);
+ stack->size -= sizeof *v;
v = (union mf_subvalue *) ofpbuf_tail(stack);
}
} else {
if (!VLOG_DROP_WARN(&rl)) {
char *flow_str = flow_to_string(flow);
- VLOG_WARN_RL(&rl, "Failed to pop from an empty stack. On flow \n"
+ VLOG_WARN_RL(&rl, "Failed to pop from an empty stack. On flow\n"
" %s", flow_str);
free(flow_str);
}
* bit indexes. "..end" may be omitted to indicate a single bit. "start..end"
* may both be omitted (the [] are still required) to indicate an entire
* field. */
-char * WARN_UNUSED_RESULT
+char * OVS_WARN_UNUSED_RESULT
mf_parse_subfield__(struct mf_subfield *sf, const char **sp)
{
const struct mf_field *field;
* bit indexes. "..end" may be omitted to indicate a single bit. "start..end"
* may both be omitted (the [] are still required) to indicate an entire
* field. */
-char * WARN_UNUSED_RESULT
+char * OVS_WARN_UNUSED_RESULT
mf_parse_subfield(struct mf_subfield *sf, const char *s)
{
char *error = mf_parse_subfield__(sf, &s);
struct nxm_field_index {
struct hmap_node header_node; /* In nxm_header_map. */
struct hmap_node name_node; /* In nxm_name_map. */
- struct list mf_node; /* In mf_mf_map[nf.id]. */
+ struct ovs_list mf_node; /* In mf_mf_map[nf.id]. */
const struct nxm_field nf;
};
static struct hmap nxm_header_map;
static struct hmap nxm_name_map;
-static struct list nxm_mf_map[MFF_N_IDS];
+static struct ovs_list nxm_mf_map[MFF_N_IDS];
static void
nxm_init(void)
for (struct nxm_field_index *nfi = all_nxm_fields;
nfi < &all_nxm_fields[ARRAY_SIZE(all_nxm_fields)]; nfi++) {
hmap_insert(&nxm_header_map, &nfi->header_node,
- hash_int(nfi->nf.header, 0));
+ hash_uint64(nxm_no_len(nfi->nf.header)));
hmap_insert(&nxm_name_map, &nfi->name_node,
hash_string(nfi->nf.name, 0));
list_push_back(&nxm_mf_map[nfi->nf.id], &nfi->mf_node);
nxm_field_by_header(uint64_t header)
{
const struct nxm_field_index *nfi;
+ uint64_t header_no_len;
nxm_init();
if (nxm_hasmask(header)) {
header = nxm_make_exact_header(header);
}
- HMAP_FOR_EACH_IN_BUCKET (nfi, header_node, hash_int(header, 0),
+ header_no_len = nxm_no_len(header);
+
+ HMAP_FOR_EACH_IN_BUCKET (nfi, header_node, hash_uint64(header_no_len),
&nxm_header_map) {
- if (header == nfi->nf.header) {
- return &nfi->nf;
+ if (header_no_len == nxm_no_len(nfi->nf.header)) {
+ if (nxm_length(header) == nxm_length(nfi->nf.header) ||
+ mf_from_id(nfi->nf.id)->variable_len) {
+ return &nfi->nf;
+ } else {
+ return NULL;
+ }
}
}
return NULL;
projects / cascardo / ovs.git / blobdiff