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39 #include <sys/queue.h>
42 #include <rte_branch_prediction.h>
43 #include <rte_common.h>
44 #include <rte_memory.h>
45 #include <rte_malloc.h>
46 #include <rte_memzone.h>
47 #include <rte_memcpy.h>
49 #include <rte_eal_memconfig.h>
50 #include <rte_per_lcore.h>
51 #include <rte_string_fns.h>
52 #include <rte_errno.h>
53 #include <rte_rwlock.h>
54 #include <rte_spinlock.h>
58 #define RTE_LPM6_TBL24_NUM_ENTRIES (1 << 24)
59 #define RTE_LPM6_TBL8_GROUP_NUM_ENTRIES 256
60 #define RTE_LPM6_TBL8_MAX_NUM_GROUPS (1 << 21)
62 #define RTE_LPM6_VALID_EXT_ENTRY_BITMASK 0xA0000000
63 #define RTE_LPM6_LOOKUP_SUCCESS 0x20000000
64 #define RTE_LPM6_TBL8_BITMASK 0x001FFFFF
66 #define ADD_FIRST_BYTE 3
67 #define LOOKUP_FIRST_BYTE 4
69 #define BYTES2_SIZE 16
71 #define lpm6_tbl8_gindex next_hop
73 /** Flags for setting an entry as valid/invalid. */
79 TAILQ_HEAD(rte_lpm6_list, rte_tailq_entry);
81 static struct rte_tailq_elem rte_lpm6_tailq = {
84 EAL_REGISTER_TAILQ(rte_lpm6_tailq)
86 /** Tbl entry structure. It is the same for both tbl24 and tbl8 */
87 struct rte_lpm6_tbl_entry {
88 uint32_t next_hop: 21; /**< Next hop / next table to be checked. */
89 uint32_t depth :8; /**< Rule depth. */
92 uint32_t valid :1; /**< Validation flag. */
93 uint32_t valid_group :1; /**< Group validation flag. */
94 uint32_t ext_entry :1; /**< External entry. */
97 /** Rules tbl entry structure. */
98 struct rte_lpm6_rule {
99 uint8_t ip[RTE_LPM6_IPV6_ADDR_SIZE]; /**< Rule IP address. */
100 uint8_t next_hop; /**< Rule next hop. */
101 uint8_t depth; /**< Rule depth. */
104 /** LPM6 structure. */
107 char name[RTE_LPM6_NAMESIZE]; /**< Name of the lpm. */
108 uint32_t max_rules; /**< Max number of rules. */
109 uint32_t used_rules; /**< Used rules so far. */
110 uint32_t number_tbl8s; /**< Number of tbl8s to allocate. */
111 uint32_t next_tbl8; /**< Next tbl8 to be used. */
114 struct rte_lpm6_rule *rules_tbl; /**< LPM rules. */
115 struct rte_lpm6_tbl_entry tbl24[RTE_LPM6_TBL24_NUM_ENTRIES]
116 __rte_cache_aligned; /**< LPM tbl24 table. */
117 struct rte_lpm6_tbl_entry tbl8[0]
118 __rte_cache_aligned; /**< LPM tbl8 table. */
122 * Takes an array of uint8_t (IPv6 address) and masks it using the depth.
123 * It leaves untouched one bit per unit in the depth variable
124 * and set the rest to 0.
127 mask_ip(uint8_t *ip, uint8_t depth)
129 int16_t part_depth, mask;
134 for (i = 0; i < RTE_LPM6_IPV6_ADDR_SIZE; i++) {
135 if (part_depth < BYTE_SIZE && part_depth >= 0) {
136 mask = (uint16_t)(~(UINT8_MAX >> part_depth));
137 ip[i] = (uint8_t)(ip[i] & mask);
138 } else if (part_depth < 0) {
141 part_depth -= BYTE_SIZE;
146 * Allocates memory for LPM object
149 rte_lpm6_create(const char *name, int socket_id,
150 const struct rte_lpm6_config *config)
152 char mem_name[RTE_LPM6_NAMESIZE];
153 struct rte_lpm6 *lpm = NULL;
154 struct rte_tailq_entry *te;
155 uint64_t mem_size, rules_size;
156 struct rte_lpm6_list *lpm_list;
158 lpm_list = RTE_TAILQ_CAST(rte_lpm6_tailq.head, rte_lpm6_list);
160 RTE_BUILD_BUG_ON(sizeof(struct rte_lpm6_tbl_entry) != sizeof(uint32_t));
162 /* Check user arguments. */
163 if ((name == NULL) || (socket_id < -1) || (config == NULL) ||
164 (config->max_rules == 0) ||
165 config->number_tbl8s > RTE_LPM6_TBL8_MAX_NUM_GROUPS) {
170 snprintf(mem_name, sizeof(mem_name), "LPM_%s", name);
172 /* Determine the amount of memory to allocate. */
173 mem_size = sizeof(*lpm) + (sizeof(lpm->tbl8[0]) *
174 RTE_LPM6_TBL8_GROUP_NUM_ENTRIES * config->number_tbl8s);
175 rules_size = sizeof(struct rte_lpm6_rule) * config->max_rules;
177 rte_rwlock_write_lock(RTE_EAL_TAILQ_RWLOCK);
179 /* Guarantee there's no existing */
180 TAILQ_FOREACH(te, lpm_list, next) {
181 lpm = (struct rte_lpm6 *) te->data;
182 if (strncmp(name, lpm->name, RTE_LPM6_NAMESIZE) == 0)
188 /* allocate tailq entry */
189 te = rte_zmalloc("LPM6_TAILQ_ENTRY", sizeof(*te), 0);
191 RTE_LOG(ERR, LPM, "Failed to allocate tailq entry!\n");
195 /* Allocate memory to store the LPM data structures. */
196 lpm = (struct rte_lpm6 *)rte_zmalloc_socket(mem_name, (size_t)mem_size,
197 RTE_CACHE_LINE_SIZE, socket_id);
200 RTE_LOG(ERR, LPM, "LPM memory allocation failed\n");
205 lpm->rules_tbl = (struct rte_lpm6_rule *)rte_zmalloc_socket(NULL,
206 (size_t)rules_size, RTE_CACHE_LINE_SIZE, socket_id);
208 if (lpm->rules_tbl == NULL) {
209 RTE_LOG(ERR, LPM, "LPM memory allocation failed\n");
215 /* Save user arguments. */
216 lpm->max_rules = config->max_rules;
217 lpm->number_tbl8s = config->number_tbl8s;
218 snprintf(lpm->name, sizeof(lpm->name), "%s", name);
220 te->data = (void *) lpm;
222 TAILQ_INSERT_TAIL(lpm_list, te, next);
225 rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK);
231 * Find an existing lpm table and return a pointer to it.
234 rte_lpm6_find_existing(const char *name)
236 struct rte_lpm6 *l = NULL;
237 struct rte_tailq_entry *te;
238 struct rte_lpm6_list *lpm_list;
240 lpm_list = RTE_TAILQ_CAST(rte_lpm6_tailq.head, rte_lpm6_list);
242 rte_rwlock_read_lock(RTE_EAL_TAILQ_RWLOCK);
243 TAILQ_FOREACH(te, lpm_list, next) {
244 l = (struct rte_lpm6 *) te->data;
245 if (strncmp(name, l->name, RTE_LPM6_NAMESIZE) == 0)
248 rte_rwlock_read_unlock(RTE_EAL_TAILQ_RWLOCK);
259 * Deallocates memory for given LPM table.
262 rte_lpm6_free(struct rte_lpm6 *lpm)
264 struct rte_lpm6_list *lpm_list;
265 struct rte_tailq_entry *te;
267 /* Check user arguments. */
271 lpm_list = RTE_TAILQ_CAST(rte_lpm6_tailq.head, rte_lpm6_list);
273 rte_rwlock_write_lock(RTE_EAL_TAILQ_RWLOCK);
275 /* find our tailq entry */
276 TAILQ_FOREACH(te, lpm_list, next) {
277 if (te->data == (void *) lpm)
281 rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK);
285 TAILQ_REMOVE(lpm_list, te, next);
287 rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK);
294 * Checks if a rule already exists in the rules table and updates
295 * the nexthop if so. Otherwise it adds a new rule if enough space is available.
297 static inline int32_t
298 rule_add(struct rte_lpm6 *lpm, uint8_t *ip, uint8_t next_hop, uint8_t depth)
302 /* Scan through rule list to see if rule already exists. */
303 for (rule_index = 0; rule_index < lpm->used_rules; rule_index++) {
305 /* If rule already exists update its next_hop and return. */
306 if ((memcmp (lpm->rules_tbl[rule_index].ip, ip,
307 RTE_LPM6_IPV6_ADDR_SIZE) == 0) &&
308 lpm->rules_tbl[rule_index].depth == depth) {
309 lpm->rules_tbl[rule_index].next_hop = next_hop;
316 * If rule does not exist check if there is space to add a new rule to
317 * this rule group. If there is no space return error.
319 if (lpm->used_rules == lpm->max_rules) {
323 /* If there is space for the new rule add it. */
324 rte_memcpy(lpm->rules_tbl[rule_index].ip, ip, RTE_LPM6_IPV6_ADDR_SIZE);
325 lpm->rules_tbl[rule_index].next_hop = next_hop;
326 lpm->rules_tbl[rule_index].depth = depth;
328 /* Increment the used rules counter for this rule group. */
335 * Function that expands a rule across the data structure when a less-generic
336 * one has been added before. It assures that every possible combination of bits
337 * in the IP address returns a match.
340 expand_rule(struct rte_lpm6 *lpm, uint32_t tbl8_gindex, uint8_t depth,
343 uint32_t tbl8_group_end, tbl8_gindex_next, j;
345 tbl8_group_end = tbl8_gindex + RTE_LPM6_TBL8_GROUP_NUM_ENTRIES;
347 struct rte_lpm6_tbl_entry new_tbl8_entry = {
349 .valid_group = VALID,
351 .next_hop = next_hop,
355 for (j = tbl8_gindex; j < tbl8_group_end; j++) {
356 if (!lpm->tbl8[j].valid || (lpm->tbl8[j].ext_entry == 0
357 && lpm->tbl8[j].depth <= depth)) {
359 lpm->tbl8[j] = new_tbl8_entry;
361 } else if (lpm->tbl8[j].ext_entry == 1) {
363 tbl8_gindex_next = lpm->tbl8[j].lpm6_tbl8_gindex
364 * RTE_LPM6_TBL8_GROUP_NUM_ENTRIES;
365 expand_rule(lpm, tbl8_gindex_next, depth, next_hop);
371 * Partially adds a new route to the data structure (tbl24+tbl8s).
372 * It returns 0 on success, a negative number on failure, or 1 if
373 * the process needs to be continued by calling the function again.
376 add_step(struct rte_lpm6 *lpm, struct rte_lpm6_tbl_entry *tbl,
377 struct rte_lpm6_tbl_entry **tbl_next, uint8_t *ip, uint8_t bytes,
378 uint8_t first_byte, uint8_t depth, uint8_t next_hop)
380 uint32_t tbl_index, tbl_range, tbl8_group_start, tbl8_group_end, i;
383 uint8_t bits_covered;
386 * Calculate index to the table based on the number and position
387 * of the bytes being inspected in this step.
390 for (i = first_byte; i < (uint32_t)(first_byte + bytes); i++) {
391 bitshift = (int8_t)((bytes - i)*BYTE_SIZE);
393 if (bitshift < 0) bitshift = 0;
394 tbl_index = tbl_index | ip[i-1] << bitshift;
397 /* Number of bits covered in this step */
398 bits_covered = (uint8_t)((bytes+first_byte-1)*BYTE_SIZE);
401 * If depth if smaller than this number (ie this is the last step)
402 * expand the rule across the relevant positions in the table.
404 if (depth <= bits_covered) {
405 tbl_range = 1 << (bits_covered - depth);
407 for (i = tbl_index; i < (tbl_index + tbl_range); i++) {
408 if (!tbl[i].valid || (tbl[i].ext_entry == 0 &&
409 tbl[i].depth <= depth)) {
411 struct rte_lpm6_tbl_entry new_tbl_entry = {
412 .next_hop = next_hop,
415 .valid_group = VALID,
419 tbl[i] = new_tbl_entry;
421 } else if (tbl[i].ext_entry == 1) {
424 * If tbl entry is valid and extended calculate the index
425 * into next tbl8 and expand the rule across the data structure.
427 tbl8_gindex = tbl[i].lpm6_tbl8_gindex *
428 RTE_LPM6_TBL8_GROUP_NUM_ENTRIES;
429 expand_rule(lpm, tbl8_gindex, depth, next_hop);
436 * If this is not the last step just fill one position
437 * and calculate the index to the next table.
440 /* If it's invalid a new tbl8 is needed */
441 if (!tbl[tbl_index].valid) {
442 if (lpm->next_tbl8 < lpm->number_tbl8s)
443 tbl8_gindex = (lpm->next_tbl8)++;
447 struct rte_lpm6_tbl_entry new_tbl_entry = {
448 .lpm6_tbl8_gindex = tbl8_gindex,
451 .valid_group = VALID,
455 tbl[tbl_index] = new_tbl_entry;
458 * If it's valid but not extended the rule that was stored *
459 * here needs to be moved to the next table.
461 else if (tbl[tbl_index].ext_entry == 0) {
462 /* Search for free tbl8 group. */
463 if (lpm->next_tbl8 < lpm->number_tbl8s)
464 tbl8_gindex = (lpm->next_tbl8)++;
468 tbl8_group_start = tbl8_gindex *
469 RTE_LPM6_TBL8_GROUP_NUM_ENTRIES;
470 tbl8_group_end = tbl8_group_start +
471 RTE_LPM6_TBL8_GROUP_NUM_ENTRIES;
473 /* Populate new tbl8 with tbl value. */
474 for (i = tbl8_group_start; i < tbl8_group_end; i++) {
475 lpm->tbl8[i].valid = VALID;
476 lpm->tbl8[i].depth = tbl[tbl_index].depth;
477 lpm->tbl8[i].next_hop = tbl[tbl_index].next_hop;
478 lpm->tbl8[i].ext_entry = 0;
482 * Update tbl entry to point to new tbl8 entry. Note: The
483 * ext_flag and tbl8_index need to be updated simultaneously,
484 * so assign whole structure in one go.
486 struct rte_lpm6_tbl_entry new_tbl_entry = {
487 .lpm6_tbl8_gindex = tbl8_gindex,
490 .valid_group = VALID,
494 tbl[tbl_index] = new_tbl_entry;
497 *tbl_next = &(lpm->tbl8[tbl[tbl_index].lpm6_tbl8_gindex *
498 RTE_LPM6_TBL8_GROUP_NUM_ENTRIES]);
508 rte_lpm6_add(struct rte_lpm6 *lpm, uint8_t *ip, uint8_t depth,
511 struct rte_lpm6_tbl_entry *tbl;
512 struct rte_lpm6_tbl_entry *tbl_next;
515 uint8_t masked_ip[RTE_LPM6_IPV6_ADDR_SIZE];
518 /* Check user arguments. */
519 if ((lpm == NULL) || (depth < 1) || (depth > RTE_LPM6_MAX_DEPTH))
522 /* Copy the IP and mask it to avoid modifying user's input data. */
523 memcpy(masked_ip, ip, RTE_LPM6_IPV6_ADDR_SIZE);
524 mask_ip(masked_ip, depth);
526 /* Add the rule to the rule table. */
527 rule_index = rule_add(lpm, masked_ip, next_hop, depth);
529 /* If there is no space available for new rule return error. */
530 if (rule_index < 0) {
534 /* Inspect the first three bytes through tbl24 on the first step. */
536 status = add_step (lpm, tbl, &tbl_next, masked_ip, ADD_FIRST_BYTE, 1,
539 rte_lpm6_delete(lpm, masked_ip, depth);
545 * Inspect one by one the rest of the bytes until
546 * the process is completed.
548 for (i = ADD_FIRST_BYTE; i < RTE_LPM6_IPV6_ADDR_SIZE && status == 1; i++) {
550 status = add_step (lpm, tbl, &tbl_next, masked_ip, 1, (uint8_t)(i+1),
553 rte_lpm6_delete(lpm, masked_ip, depth);
563 * Takes a pointer to a table entry and inspect one level.
564 * The function returns 0 on lookup success, ENOENT if no match was found
565 * or 1 if the process needs to be continued by calling the function again.
568 lookup_step(const struct rte_lpm6 *lpm, const struct rte_lpm6_tbl_entry *tbl,
569 const struct rte_lpm6_tbl_entry **tbl_next, uint8_t *ip,
570 uint8_t first_byte, uint8_t *next_hop)
572 uint32_t tbl8_index, tbl_entry;
574 /* Take the integer value from the pointer. */
575 tbl_entry = *(const uint32_t *)tbl;
577 /* If it is valid and extended we calculate the new pointer to return. */
578 if ((tbl_entry & RTE_LPM6_VALID_EXT_ENTRY_BITMASK) ==
579 RTE_LPM6_VALID_EXT_ENTRY_BITMASK) {
581 tbl8_index = ip[first_byte-1] +
582 ((tbl_entry & RTE_LPM6_TBL8_BITMASK) *
583 RTE_LPM6_TBL8_GROUP_NUM_ENTRIES);
585 *tbl_next = &lpm->tbl8[tbl8_index];
589 /* If not extended then we can have a match. */
590 *next_hop = (uint8_t)tbl_entry;
591 return (tbl_entry & RTE_LPM6_LOOKUP_SUCCESS) ? 0 : -ENOENT;
599 rte_lpm6_lookup(const struct rte_lpm6 *lpm, uint8_t *ip, uint8_t *next_hop)
601 const struct rte_lpm6_tbl_entry *tbl;
602 const struct rte_lpm6_tbl_entry *tbl_next;
605 uint32_t tbl24_index;
607 /* DEBUG: Check user input arguments. */
608 if ((lpm == NULL) || (ip == NULL) || (next_hop == NULL)) {
612 first_byte = LOOKUP_FIRST_BYTE;
613 tbl24_index = (ip[0] << BYTES2_SIZE) | (ip[1] << BYTE_SIZE) | ip[2];
615 /* Calculate pointer to the first entry to be inspected */
616 tbl = &lpm->tbl24[tbl24_index];
619 /* Continue inspecting following levels until success or failure */
620 status = lookup_step(lpm, tbl, &tbl_next, ip, first_byte++, next_hop);
622 } while (status == 1);
628 * Looks up a group of IP addresses
631 rte_lpm6_lookup_bulk_func(const struct rte_lpm6 *lpm,
632 uint8_t ips[][RTE_LPM6_IPV6_ADDR_SIZE],
633 int16_t * next_hops, unsigned n)
636 const struct rte_lpm6_tbl_entry *tbl;
637 const struct rte_lpm6_tbl_entry *tbl_next;
638 uint32_t tbl24_index;
639 uint8_t first_byte, next_hop;
642 /* DEBUG: Check user input arguments. */
643 if ((lpm == NULL) || (ips == NULL) || (next_hops == NULL)) {
647 for (i = 0; i < n; i++) {
648 first_byte = LOOKUP_FIRST_BYTE;
649 tbl24_index = (ips[i][0] << BYTES2_SIZE) |
650 (ips[i][1] << BYTE_SIZE) | ips[i][2];
652 /* Calculate pointer to the first entry to be inspected */
653 tbl = &lpm->tbl24[tbl24_index];
656 /* Continue inspecting following levels until success or failure */
657 status = lookup_step(lpm, tbl, &tbl_next, ips[i], first_byte++,
660 } while (status == 1);
665 next_hops[i] = next_hop;
672 * Finds a rule in rule table.
673 * NOTE: Valid range for depth parameter is 1 .. 128 inclusive.
675 static inline int32_t
676 rule_find(struct rte_lpm6 *lpm, uint8_t *ip, uint8_t depth)
680 /* Scan used rules at given depth to find rule. */
681 for (rule_index = 0; rule_index < lpm->used_rules; rule_index++) {
682 /* If rule is found return the rule index. */
683 if ((memcmp (lpm->rules_tbl[rule_index].ip, ip,
684 RTE_LPM6_IPV6_ADDR_SIZE) == 0) &&
685 lpm->rules_tbl[rule_index].depth == depth) {
691 /* If rule is not found return -ENOENT. */
696 * Look for a rule in the high-level rules table
699 rte_lpm6_is_rule_present(struct rte_lpm6 *lpm, uint8_t *ip, uint8_t depth,
702 uint8_t ip_masked[RTE_LPM6_IPV6_ADDR_SIZE];
705 /* Check user arguments. */
706 if ((lpm == NULL) || next_hop == NULL || ip == NULL ||
707 (depth < 1) || (depth > RTE_LPM6_MAX_DEPTH))
710 /* Copy the IP and mask it to avoid modifying user's input data. */
711 memcpy(ip_masked, ip, RTE_LPM6_IPV6_ADDR_SIZE);
712 mask_ip(ip_masked, depth);
714 /* Look for the rule using rule_find. */
715 rule_index = rule_find(lpm, ip_masked, depth);
717 if (rule_index >= 0) {
718 *next_hop = lpm->rules_tbl[rule_index].next_hop;
722 /* If rule is not found return 0. */
727 * Delete a rule from the rule table.
728 * NOTE: Valid range for depth parameter is 1 .. 128 inclusive.
731 rule_delete(struct rte_lpm6 *lpm, int32_t rule_index)
734 * Overwrite redundant rule with last rule in group and decrement rule
737 lpm->rules_tbl[rule_index] = lpm->rules_tbl[lpm->used_rules-1];
745 rte_lpm6_delete(struct rte_lpm6 *lpm, uint8_t *ip, uint8_t depth)
747 int32_t rule_to_delete_index;
748 uint8_t ip_masked[RTE_LPM6_IPV6_ADDR_SIZE];
752 * Check input arguments.
754 if ((lpm == NULL) || (depth < 1) || (depth > RTE_LPM6_MAX_DEPTH)) {
758 /* Copy the IP and mask it to avoid modifying user's input data. */
759 memcpy(ip_masked, ip, RTE_LPM6_IPV6_ADDR_SIZE);
760 mask_ip(ip_masked, depth);
763 * Find the index of the input rule, that needs to be deleted, in the
766 rule_to_delete_index = rule_find(lpm, ip_masked, depth);
769 * Check if rule_to_delete_index was found. If no rule was found the
770 * function rule_find returns -ENOENT.
772 if (rule_to_delete_index < 0)
773 return rule_to_delete_index;
775 /* Delete the rule from the rule table. */
776 rule_delete(lpm, rule_to_delete_index);
779 * Set all the table entries to 0 (ie delete every rule
780 * from the data structure.
783 memset(lpm->tbl24, 0, sizeof(lpm->tbl24));
784 memset(lpm->tbl8, 0, sizeof(lpm->tbl8[0])
785 * RTE_LPM6_TBL8_GROUP_NUM_ENTRIES * lpm->number_tbl8s);
788 * Add every rule again (except for the one that was removed from
791 for (i = 0; i < lpm->used_rules; i++) {
792 rte_lpm6_add(lpm, lpm->rules_tbl[i].ip, lpm->rules_tbl[i].depth,
793 lpm->rules_tbl[i].next_hop);
800 * Deletes a group of rules
803 rte_lpm6_delete_bulk_func(struct rte_lpm6 *lpm,
804 uint8_t ips[][RTE_LPM6_IPV6_ADDR_SIZE], uint8_t *depths, unsigned n)
806 int32_t rule_to_delete_index;
807 uint8_t ip_masked[RTE_LPM6_IPV6_ADDR_SIZE];
811 * Check input arguments.
813 if ((lpm == NULL) || (ips == NULL) || (depths == NULL)) {
817 for (i = 0; i < n; i++) {
818 /* Copy the IP and mask it to avoid modifying user's input data. */
819 memcpy(ip_masked, ips[i], RTE_LPM6_IPV6_ADDR_SIZE);
820 mask_ip(ip_masked, depths[i]);
823 * Find the index of the input rule, that needs to be deleted, in the
826 rule_to_delete_index = rule_find(lpm, ip_masked, depths[i]);
829 * Check if rule_to_delete_index was found. If no rule was found the
830 * function rule_find returns -ENOENT.
832 if (rule_to_delete_index < 0)
835 /* Delete the rule from the rule table. */
836 rule_delete(lpm, rule_to_delete_index);
840 * Set all the table entries to 0 (ie delete every rule
841 * from the data structure.
844 memset(lpm->tbl24, 0, sizeof(lpm->tbl24));
845 memset(lpm->tbl8, 0, sizeof(lpm->tbl8[0])
846 * RTE_LPM6_TBL8_GROUP_NUM_ENTRIES * lpm->number_tbl8s);
849 * Add every rule again (except for the ones that were removed from
852 for (i = 0; i < lpm->used_rules; i++) {
853 rte_lpm6_add(lpm, lpm->rules_tbl[i].ip, lpm->rules_tbl[i].depth,
854 lpm->rules_tbl[i].next_hop);
861 * Delete all rules from the LPM table.
864 rte_lpm6_delete_all(struct rte_lpm6 *lpm)
866 /* Zero used rules counter. */
869 /* Zero next tbl8 index. */
873 memset(lpm->tbl24, 0, sizeof(lpm->tbl24));
876 memset(lpm->tbl8, 0, sizeof(lpm->tbl8[0]) *
877 RTE_LPM6_TBL8_GROUP_NUM_ENTRIES * lpm->number_tbl8s);
879 /* Delete all rules form the rules table. */
880 memset(lpm->rules_tbl, 0, sizeof(struct rte_lpm6_rule) * lpm->max_rules);