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poptrie_private.h
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/*_
* Copyright (c) 2017 Hirochika Asai <[email protected]>
* All rights reserved.
*/
#ifndef _POPTRIE_PRIVATE_H
#define _POPTRIE_PRIVATE_H
#include "buddy.h"
#include "poptrie.h"
#include <stdlib.h>
#include <string.h>
/* Bit test */
#define BT(a, b) (((a) >> (b)) & 1)
#define EXT_NH(n) ((n)->ext ? (n)->ext->nexthop : 0)
#define VEC_INIT(v) ((v) = 0)
#define BITINDEX(v) ((v) & ((1 << 6) - 1))
#define NODEINDEX(v) ((v) >> 6)
#define VEC_CLEAR(v, i) ((v) &= ~((u64)1 << (i)))
#define VEC_BT(v, i) ((v) & (u64)1 << (i))
#define VEC_SET(v, i) ((v) |= (u64)1 << (i))
#define POPCNT(v) popcnt(v)
#define ZEROCNT(v) popcnt(~(v))
#define POPCNT_LS(v, i) popcnt((v) & (((u64)2 << (i)) - 1))
#define ZEROCNT_LS(v, i) popcnt((~(v)) & (((u64)2 << (i)) - 1))
struct poptrie_stack {
int inode;
int idx;
int width;
poptrie_leaf_t nexthop;
};
/* Prototype declarations */
static int
poptrie_route_add_propagate(struct radix_node *, struct radix_node *);
static int
poptrie_route_change_propagate(struct radix_node *, struct radix_node *);
static int
poptrie_route_del_propagate(struct radix_node *, struct radix_node *,
struct radix_node *);
static int
_update_inode(struct poptrie *, struct radix_node *, int, poptrie_node_t *,
poptrie_leaf_t *);
static int
_update_inode_chunk(struct poptrie *, struct radix_node *, int,
poptrie_node_t *, poptrie_leaf_t *);
static int
_update_inode_chunk_rec(struct poptrie *, struct radix_node *, int,
poptrie_node_t *, poptrie_leaf_t *, int, int);
static int
_update_part(struct poptrie *, struct radix_node *, int, struct poptrie_stack *,
u32 *, int);
static int
_update_part_loop1(struct poptrie *, struct radix_node *, int,
struct poptrie_stack *, struct poptrie_node *,
poptrie_leaf_t, int *);
static int
_update_part_loop2(struct poptrie *, struct poptrie_stack *,
struct poptrie_node *);
static int
_update_part_dp(struct poptrie *, struct radix_node *, int, u32 *, int);
static struct radix_node * _next_block(struct radix_node *, int, int, int);
static void
_parse_triangle(struct radix_node *, u64 *, struct radix_node *, int, int);
static void _update_clean_node(struct poptrie *, poptrie_node_t *, int);
static void _update_clean_inode(struct poptrie *, int, int);
static void _update_clean_root(struct poptrie *, int, int);
static void _update_clean_subtree(struct poptrie *, int);
/*
* Bit scan of the most significant set bit to calculate 2^n-byte aligned size
*/
static inline int
bsr(u64 x)
{
if ( !x ) {
return 0;
}
return ((sizeof(u64) << 3) - 1) - __builtin_clzll(x);
}
/*
* Mark the descendant node to be updated after the route_add operation
*/
static int
poptrie_route_add_propagate(struct radix_node *node, struct radix_node *ext)
{
if ( NULL != node->ext ) {
if ( ext->len > node->ext->len ) {
/* This new node is more specific. */
if ( ext->nexthop != EXT_NH(node) ) {
/* Prefix and next hop are updated. */
node->mark = 1;
}
node->mark = 1;
node->ext = ext;
} else {
/* This new node is less specific, then terminate. */
node->mark = 1;
return node->mark;
}
} else {
/* The new route is propagated. */
node->mark = 1;
node->ext = ext;
}
if ( NULL != node->left ) {
node->mark |= poptrie_route_add_propagate(node->left, ext);
}
if ( NULL != node->right ) {
node->mark |= poptrie_route_add_propagate(node->right, ext);
}
return node->mark;
}
/*
* Mark the descendant node to be updated after the route_change operation
*/
static int
poptrie_route_change_propagate(struct radix_node *node, struct radix_node *ext)
{
/* Mark if the cache is updated */
if ( ext == node->ext ) {
node->mark = 1;
}
if ( NULL != node->left ) {
node->mark |= poptrie_route_change_propagate(node->left, ext);
}
if ( NULL != node->right ) {
node->mark |= poptrie_route_change_propagate(node->right, ext);
}
return node->mark;
}
/*
* Mark the descendant node to be updated after the route_del operation
*/
static int
poptrie_route_del_propagate(struct radix_node *node, struct radix_node *oext,
struct radix_node *next)
{
if ( oext == node->ext ) {
if ( oext->nexthop != EXT_NH(node) ) {
/* Next hop will change */
node->mark = 1;
}
/* Replace the extracted node */
node->ext = next;
node->mark = 1;
}
if ( NULL != node->left ) {
node->mark |= poptrie_route_del_propagate(node->left, oext, next);
}
if ( NULL != node->right ) {
node->mark |= poptrie_route_del_propagate(node->right, oext, next);
}
return node->mark;
}
/*
* Update an internal node
*/
static int
_update_inode(struct poptrie *poptrie, struct radix_node *node, int inode,
poptrie_node_t *n, poptrie_leaf_t *leaf)
{
int i;
u64 vector;
u64 leafvec;
int nvec;
int nlvec;
struct radix_node nodes[1 << 6];
poptrie_node_t children[1 << 6];
poptrie_leaf_t leaves[1 << 6];
u64 prev;
int base0;
int base1;
int ret;
poptrie_leaf_t sleaf;
int p;
int ninode;
int num;
/* Parse triangle */
VEC_INIT(vector);
_parse_triangle(node, &vector, nodes, 0, 0);
/* Traverse children first */
VEC_INIT(leafvec);
prev = (u64)-1;
nvec = 0;
nlvec = 0;
for ( i = 0; i < (1 << 6); i++ ) {
if ( VEC_BT(vector, i) ) {
/* Internal node */
if ( (nodes[i].left && nodes[i].left->mark)
|| (nodes[i].right && nodes[i].right->mark)
|| inode < 0 ) {
/* One or more child is marked */
if ( inode >= 0 ) {
if ( VEC_BT(poptrie->nodes[inode].vector, i) ) {
p = POPCNT_LS(poptrie->nodes[inode].vector, i);
ninode = poptrie->nodes[inode].base1 + (p - 1);
} else {
ninode = -1;
}
} else {
ninode = -1;
}
ret = _update_inode_chunk(poptrie, &nodes[i], ninode,
children + i, &sleaf);
if ( ret < 0 ) {
return -1;
}
if ( ret > 0 ) {
/* The vertical compression is performed then check the
horizontal compression */
VEC_CLEAR(vector, i);
if ( prev != sleaf ) {
VEC_SET(leafvec, i);
leaves[nlvec] = sleaf;
nlvec++;
}
prev = sleaf;
} else {
/* Not compressed */
nvec++;
}
} else {
/* None of children is marked, then copy */
if ( VEC_BT(poptrie->nodes[inode].vector, i) ) {
/* Connect to the working internal node */
p = POPCNT_LS(poptrie->nodes[inode].vector, i);
memcpy(children + i,
poptrie->nodes + poptrie->nodes[inode].base1
+ (p - 1), sizeof(poptrie_node_t));
nvec++;
} else {
/* The working child is a leaf node */
VEC_CLEAR(vector, i);
p = POPCNT_LS(poptrie->nodes[inode].leafvec, i);
sleaf
= poptrie->leaves[poptrie->nodes[inode].base0 + p - 1];
if ( prev != sleaf ) {
VEC_SET(leafvec, i);
leaves[nlvec] = sleaf;
nlvec++;
}
prev = sleaf;
}
}
} else {
/* Leaf compression */
if ( prev != EXT_NH(&nodes[i]) ) {
VEC_SET(leafvec, i);
leaves[nlvec] = EXT_NH(&nodes[i]);
nlvec++;
}
prev = EXT_NH(&nodes[i]);
}
}
/* Internal nodes */
base1 = -1;
if ( nvec > 0 ) {
p = nvec;
base1 = buddy_alloc2(poptrie->cnodes, bsr(p - 1) + 1);
if ( base1 < 0 ) {
return -1;
}
}
/* Leaves */
base0 = -1;
if ( nlvec > 0 ) {
p = nlvec;
base0 = buddy_alloc2(poptrie->cleaves, bsr(p - 1) + 1);
if ( base0 < 0 ) {
if ( base1 >= 0 ) {
buddy_free2(poptrie->cnodes, base1);
}
return -1;
}
}
/* Internal nodes */
num = 0;
for ( i = 0; i < (1 << 6); i++ ) {
if ( VEC_BT(vector, i) ) {
memcpy(&poptrie->nodes[base1 + num], &children[i],
sizeof(poptrie_node_t));
num++;
}
}
/* Leaves */
for ( i = 0; i < nlvec; i++ ) {
poptrie->leaves[base0 + i] = leaves[i];
}
n->vector = vector;
n->leafvec = leafvec;
n->base0 = base0;
n->base1 = base1;
if ( 0 == nvec && 1 == nlvec && NULL != leaf ) {
/* Only one leaf belonging to this internal node, then compress
this (but can't do this for the top tier when leaf is NULL) */
*leaf = leaves[0];
return 1;
}
return 0;
}
/*
* Update an internal node chunk
*/
static int
_update_inode_chunk(struct poptrie *poptrie, struct radix_node *node,
int inode, poptrie_node_t *nodes, poptrie_leaf_t *leaf)
{
int ret;
ret = _update_inode_chunk_rec(poptrie, node, inode, nodes, leaf, 0, 0);
if ( ret > 0 ) {
/* Clean */
buddy_free2(poptrie->cleaves, nodes[0].base0);
}
return ret;
}
static int
_update_inode_chunk_rec(struct poptrie *poptrie, struct radix_node *node,
int inode, poptrie_node_t *nodes, poptrie_leaf_t *leaf,
int pos, int r)
{
int ret;
int ret0;
int ret1;
struct radix_node tmp;
poptrie_leaf_t sleaf0;
poptrie_leaf_t sleaf1;
if ( 0 == r ) {
if ( NULL != leaf ) {
ret = _update_inode(poptrie, node, inode + pos, nodes + pos,
&sleaf0);
if ( ret < 0 ) {
return -1;
}
if ( ret > 0 ) {
*leaf = sleaf0;
}
} else {
ret = _update_inode(poptrie, node, inode + pos, nodes + pos, NULL);
if ( ret < 0 ) {
return -1;
}
}
return ret;
}
/* Decrement */
r--;
/* Left */
if ( node->left ) {
ret0 = _update_inode_chunk_rec(poptrie, node->left, inode, nodes,
leaf ? &sleaf0 : NULL, pos, r);
if ( ret0 < 0 ) {
return -1;
}
} else {
tmp.left = NULL;
tmp.right = NULL;
tmp.ext = node->ext;
ret0 = _update_inode_chunk_rec(poptrie, &tmp, inode, nodes,
leaf ? &sleaf0 : NULL, pos, r);
if ( ret0 < 0 ) {
return -1;
}
}
/* Right */
if ( node->right ) {
ret1 = _update_inode_chunk_rec(poptrie, node->right, inode, nodes,
leaf ? &sleaf1 : NULL,
pos + (1 << r), r);
if ( ret1 < 0 ) {
return -1;
}
} else {
tmp.left = NULL;
tmp.right = NULL;
tmp.ext = node->ext;
ret1 = _update_inode_chunk_rec(poptrie, &tmp, inode, nodes,
leaf ? &sleaf1 : NULL,
pos + (1 << r), r);
if ( ret1 < 0 ) {
return -1;
}
}
if ( ret0 > 0 && ret1 > 0 && NULL != leaf && sleaf0 == sleaf1 ) {
*leaf = sleaf0;
return 1;
}
return 0;
}
/*
* Update the partial tree
*/
static int
_update_part(struct poptrie *poptrie, struct radix_node *tnode, int inode,
struct poptrie_stack *stack, u32 *root, int alt)
{
struct poptrie_node *cnodes;
int ret;
poptrie_leaf_t sleaf;
int vcomp;
int nroot;
int oroot;
/* Pop from the stack */
stack--;
/* Build the updated part */
if ( stack->idx < 0 ) {
/* Direct pointing entry */
return _update_part_dp(poptrie, tnode, inode, root, alt);
}
/* Allocate descendant nodes */
#if POPTRIE_S < 6
cnodes = alloca(sizeof(struct poptrie_node));
#else
cnodes = alloca(sizeof(struct poptrie_node) << (POPTRIE_S - 6));
#endif
if ( NULL == cnodes ) {
return -1;
}
/* Not the root */
ret = _update_inode_chunk_rec(poptrie, tnode, inode, cnodes, &sleaf, 0, 0);
if ( ret < 0 ) {
return -1;
}
if ( ret > 0 ) {
vcomp = 1;
buddy_free2(poptrie->cleaves, cnodes[0].base0);
cnodes[0].base0 = -1;
} else {
vcomp = 0;
}
while ( vcomp && stack->idx >= 0 ) {
ret = _update_part_loop1(poptrie, tnode, inode, stack, cnodes, sleaf,
&vcomp);
if ( ret < 0 ) {
return -1;
} else if ( ret > 0 ) {
return 0;
}
stack--;
}
while ( stack->idx >= 0 ) {
ret = _update_part_loop2(poptrie, stack, cnodes);
if ( ret < 0 ) {
return -1;
} else if ( ret > 0 ) {
return 0;
}
stack--;
}
/* Replace the root */
nroot = buddy_alloc2(poptrie->cnodes, 0);
if ( nroot < 0 ) {
return -1;
}
memcpy(poptrie->nodes + nroot, cnodes, sizeof(poptrie_node_t));
oroot = poptrie->root;
poptrie->root = nroot;
/* Swap */
oroot = *root;
__sync_lock_test_and_set(root, nroot);
/* Clean */
if ( !alt && !(oroot & ((u32)1<<31)) ) {
_update_clean_root(poptrie, nroot, oroot);
}
return 0;
}
static int
_update_part_loop1(struct poptrie *poptrie, struct radix_node *tnode, int inode,
struct poptrie_stack *stack, struct poptrie_node *cnodes,
poptrie_leaf_t sleaf, int *vcomp)
{
int i;
int base0;
int base1;
int p;
int n;
poptrie_leaf_t leaves[1 << 6];
u64 prev;
struct poptrie_node *node;
u64 vector;
u64 leafvec;
/* Perform vertical compresion */
if ( stack->inode < 0 ) {
if ( stack->nexthop != sleaf ) {
/* Compression ends here */
*vcomp = 0;
for ( i = 0; i < (1 << (stack->width - 6)); i++ ) {
VEC_INIT(cnodes[i].vector);
VEC_INIT(cnodes[i].leafvec);
if ( i == NODEINDEX(stack->idx) ) {
if ( 0 == BITINDEX(stack->idx) ) {
/* Insert to the left */
base0 = buddy_alloc2(poptrie->cleaves, 1);
if ( base0 < 0 ) {
return -1;
}
poptrie->leaves[base0] = sleaf;
poptrie->leaves[base0 + 1] = stack->nexthop;
VEC_SET(cnodes[i].leafvec, 0);
VEC_SET(cnodes[i].leafvec, 1);
} else if ( ((1 << 6) - 1) == BITINDEX(stack->idx) ) {
/* Insert to the right */
base0 = buddy_alloc2(poptrie->cleaves, 1);
if ( base0 < 0 ) {
return -1;
}
poptrie->leaves[base0] = stack->nexthop;
poptrie->leaves[base0 + 1] = sleaf;
VEC_SET(cnodes[i].leafvec, 0);
VEC_SET(cnodes[i].leafvec, BITINDEX(stack->idx));
} else {
/* Insert to the middle */
base0 = buddy_alloc2(poptrie->cleaves, 2);
if ( base0 < 0 ) {
return -1;
}
poptrie->leaves[base0] = stack->nexthop;
poptrie->leaves[base0 + 1] = sleaf;
poptrie->leaves[base0 + 2] = stack->nexthop;
VEC_SET(cnodes[i].leafvec, 0);
VEC_SET(cnodes[i].leafvec, BITINDEX(stack->idx));
VEC_SET(cnodes[i].leafvec,
BITINDEX(stack->idx) + 1);
}
} else {
base0 = buddy_alloc2(poptrie->cleaves, 0);
if ( base0 < 0 ) {
return -1;
}
poptrie->leaves[base0] = stack->nexthop;
VEC_SET(cnodes[i].leafvec, 0);
}
cnodes[i].base0 = base0;
cnodes[i].base1 = -1;
}
}
} else {
node = &poptrie->nodes[stack->inode + NODEINDEX(stack->idx)];
vector = node->vector;
if ( VEC_BT(node->vector, BITINDEX(stack->idx)) ) {
/* Internal node to leaf */
VEC_CLEAR(vector, BITINDEX(stack->idx));
VEC_INIT(leafvec);
n = 0;
prev = (u64)-1;
for ( i = 0; i < (1 << 6); i++ ) {
if ( !VEC_BT(vector, i) ) {
if ( i == BITINDEX(stack->idx) ) {
if ( sleaf != prev ) {
leaves[n] = sleaf;
VEC_SET(leafvec, i);
n++;
}
prev = sleaf;
} else {
p = POPCNT_LS(node->leafvec, i);
if ( poptrie->leaves[node->base0 + p - 1] != prev ) {
leaves[n] = poptrie->leaves[node->base0 + p - 1];
VEC_SET(leafvec, i);
n++;
}
prev = poptrie->leaves[node->base0 + p - 1];
}
}
}
if ( 1 != n || 0 != POPCNT(vector) || (stack - 1)->idx < 0 ) {
*vcomp = 0;
base0 = buddy_alloc2(poptrie->cleaves, bsr(n - 1) + 1);
if ( base0 < 0 ) {
return -1;
}
memcpy(poptrie->leaves + base0, leaves,
sizeof(poptrie_leaf_t) * n);
p = POPCNT(vector);
n = p;
if ( n > 0 ) {
base1 = buddy_alloc2(poptrie->cnodes, bsr(n - 1) + 1);
if ( base1 < 0 ) {
return -1;
}
} else {
base1 = -1;
}
/* Copy all */
n = 0;
for ( i = 0; i < (1 << 6); i++ ) {
if ( VEC_BT(vector, i) ) {
p = POPCNT_LS(node->vector, i);
p = (p - 1);
memcpy(&poptrie->nodes[base1 + n],
&poptrie->nodes[node->base1 + p],
sizeof(poptrie_node_t));
n += 1;
}
}
memcpy(cnodes, poptrie->nodes + stack->inode,
sizeof(poptrie_node_t) << (stack->width - 6));
cnodes[NODEINDEX(stack->idx)].vector = vector;
cnodes[NODEINDEX(stack->idx)].leafvec = leafvec;
cnodes[NODEINDEX(stack->idx)].base0 = base0;
cnodes[NODEINDEX(stack->idx)].base1 = base1;
}
} else {
/* Leaf node is changed */
VEC_INIT(leafvec);
n = 0;
prev = (u64)-1;
for ( i = 0; i < (1 << 6); i++ ) {
if ( !VEC_BT(vector, i) ) {
if ( i == BITINDEX(stack->idx) ) {
if ( sleaf != prev ) {
leaves[n] = sleaf;
VEC_SET(leafvec, i);
n++;
}
prev = sleaf;
} else {
p = POPCNT_LS(node->leafvec, i);
if ( poptrie->leaves[node->base0 + p - 1] != prev ) {
leaves[n] = poptrie->leaves[node->base0 + p - 1];
VEC_SET(leafvec, i);
n++;
}
prev = poptrie->leaves[node->base0 + p - 1];
}
}
}
if ( 1 != n || 0 != POPCNT(vector) || (stack - 1)->idx < 0 ) {
*vcomp = 0;
if ( node->leafvec == leafvec ) {
/* Nothing has changed */
return 1;
}
base0 = buddy_alloc2(poptrie->cleaves, bsr(n - 1) + 1);
if ( base0 < 0 ) {
return -1;
}
memcpy(poptrie->leaves + base0, leaves,
sizeof(poptrie_leaf_t) * n);
memcpy(cnodes, poptrie->nodes + stack->inode,
sizeof(poptrie_node_t) << (stack->width - 6));
cnodes[NODEINDEX(stack->idx)].vector = vector;
cnodes[NODEINDEX(stack->idx)].leafvec = leafvec;
cnodes[NODEINDEX(stack->idx)].base0 = base0;
}
}
}
return 0;
}
static int
_update_part_loop2(struct poptrie *poptrie, struct poptrie_stack *stack,
struct poptrie_node *cnodes)
{
int oroot;
int p;
int n;
int base1;
int base0;
int i;
int j;
poptrie_leaf_t leaves[1 << 6];
u64 prev;
struct poptrie_node *node;
u64 vector;
u64 leafvec;
if ( stack->inode < 0 ) {
/* Create a new node */
base1 = buddy_alloc2(poptrie->cnodes, 0);
if ( base1 < 0 ) {
return -1;
}
memcpy(poptrie->nodes + base1, cnodes, sizeof(poptrie_node_t));
/* Build the next one */
for ( i = 0; i < (1 << (stack->width - 6)); i++ ) {
VEC_INIT(cnodes[i].vector);
VEC_INIT(cnodes[i].leafvec);
cnodes[i].base1 = -1;
cnodes[i].base0 = -1;
}
VEC_SET(cnodes[NODEINDEX(stack->idx)].vector, BITINDEX(stack->idx));
cnodes[NODEINDEX(stack->idx)].base1 = base1;
for ( i = 0; i < (1 << (stack->width - 6)); i++ ) {
base0 = buddy_alloc2(poptrie->cleaves, 0);
if ( base0 < 0 ) {
return -1;
}
poptrie->leaves[base0] = stack->nexthop;
if ( VEC_BT(cnodes[i].vector, 0) ) {
VEC_SET(cnodes[i].leafvec, 1);
} else {
VEC_SET(cnodes[i].leafvec, 0);
}
cnodes[i].base0 = base0;
}
} else {
/* Parent internal node is specified */
node = &poptrie->nodes[stack->inode + NODEINDEX(stack->idx)];
if ( VEC_BT(node->vector, BITINDEX(stack->idx)) ) {
/* Same vector, then allocate and replace */
p = POPCNT(node->vector);
n = p;
base1 = buddy_alloc2(poptrie->cnodes, bsr(n - 1) + 1);
if ( base1 < 0 ) {
return -1;
}
/* Copy all */
n = 0;
for ( i = 0; i < (1 << 6); i++ ) {
if ( VEC_BT(node->vector, i) ) {
if ( i == BITINDEX(stack->idx) ) {
memcpy(&poptrie->nodes[base1 + n], cnodes,
sizeof(poptrie_node_t));
} else {
memcpy(&poptrie->nodes[base1 + n],
&poptrie->nodes[node->base1 + n],
sizeof(poptrie_node_t));
}
n += 1;
}
}
oroot = node->base1;
node->base1 = base1;
_update_clean_node(poptrie, node, oroot);
return 1;
} else {
/* Different vector, then allocate and go up */
vector = node->vector;
VEC_SET(vector, BITINDEX(stack->idx));
p = POPCNT(vector);
n = p;
base1 = buddy_alloc2(poptrie->cnodes, bsr(n - 1) + 1);
if ( base1 < 0 ) {
return -1;
}
VEC_INIT(leafvec);
n = ZEROCNT(vector);
if ( n > 0 ) {
n = 0;
prev = (u64)-1;
for ( i = 0; i < (1 << 6); i++ ) {
if ( !VEC_BT(vector, i) ) {
p = POPCNT_LS(node->leafvec, i);
if ( poptrie->leaves[node->base0 + p - 1] != prev ) {
leaves[n] = poptrie->leaves[node->base0 + p - 1];
VEC_SET(leafvec, i);
prev = poptrie->leaves[node->base0 + p - 1];
n++;
}
}
}
base0 = buddy_alloc2(poptrie->cleaves, bsr(n - 1) + 1);
if ( base0 < 0 ) {
return -1;
}
memcpy(poptrie->leaves + base0, leaves,
sizeof(poptrie_leaf_t) * n);
} else {
base0 = -1;
}
/* Copy all */
n = 0;
j = 0;
for ( i = 0; i < (1 << 6); i++ ) {
if ( VEC_BT(node->vector, i) ) {
memcpy(&poptrie->nodes[base1 + n],
&poptrie->nodes[node->base1 + j],
sizeof(poptrie_node_t));
n += 1;
j += 1;
} else if ( i == BITINDEX(stack->idx) ) {
memcpy(&poptrie->nodes[base1 + n], cnodes,
sizeof(poptrie_node_t));
n += 1;
}
}
memcpy(cnodes, poptrie->nodes + stack->inode,
sizeof(poptrie_node_t) << (stack->width - 6));
cnodes[NODEINDEX(stack->idx)].base1 = base1;
cnodes[NODEINDEX(stack->idx)].base0 = base0;
cnodes[NODEINDEX(stack->idx)].vector = vector;
cnodes[NODEINDEX(stack->idx)].leafvec = leafvec;
}
}
return 0;
}
static int
_update_part_dp(struct poptrie *poptrie, struct radix_node *tnode, int inode,
u32 *root, int alt)
{
struct poptrie_node *cnodes;
int ret;
poptrie_leaf_t sleaf;
int nroot;
int oroot;
cnodes = alloca(sizeof(struct poptrie_node));
if ( NULL == cnodes ) {
return -1;
}
ret = _update_inode_chunk_rec(poptrie, tnode, inode, cnodes, &sleaf, 0, 0);
if ( ret < 0 ) {
return -1;
}
if ( ret > 0 ) {
/* Clean */
buddy_free2(poptrie->cleaves, cnodes[0].base0);
cnodes[0].base0 = -1;
/* Replace the root with an atomic instruction */
nroot = ((u32)1 << 31) | sleaf;
oroot = *root;
__sync_lock_test_and_set(root, nroot);
if ( !alt ) {
_update_clean_subtree(poptrie, oroot);
if ( (int)oroot >= 0 ) {
buddy_free2(poptrie->cnodes, oroot);
}
}
return 0;
} else {
/* Replace the root */
nroot = buddy_alloc2(poptrie->cnodes, 0);
if ( nroot < 0 ) {
return -1;
}
memcpy(poptrie->nodes + nroot, cnodes, sizeof(struct poptrie_node));
oroot = poptrie->root;
poptrie->root = nroot;
/* Replace the root with an atomic instruction */
oroot = *root;
__sync_lock_test_and_set(root, nroot);
/* Clean */
if ( !alt && !(oroot & ((u32)1 << 31)) ) {
_update_clean_root(poptrie, nroot, oroot);
}
return 0;
}
}
/*
* Get the descending block from the index and shift
*/
static struct radix_node *
_next_block(struct radix_node *node, int idx, int shift, int depth)
{
if ( NULL == node ) {
return NULL;
}
if ( shift == depth ) {
return node;
}
if ( (idx >> (depth - shift - 1)) & 0x1 ) {
/* Right */
return _next_block(node->right, idx, shift + 1, depth);
} else {
/* Left */
return _next_block(node->left, idx, shift + 1, depth);
}
}
/*
* Parse triangle (k-bit subtree)
*/
static void
_parse_triangle(struct radix_node *node, u64 *vector, struct radix_node *nodes,
int pos, int depth)
{
int i;
int hlen;
if ( 6 == depth ) {
/* Bottom of the triangle */
memcpy(&nodes[pos], node, sizeof(struct radix_node));
if ( node->left || node->right ) {
/* Child internal nodes exist */
VEC_SET(*vector, pos);
}
return;
}
/* Calculate half length */
hlen = (1 << (6 - depth - 1));
/* Left */
if ( node->left ) {
_parse_triangle(node->left, vector, nodes, pos, depth + 1);
} else {
for ( i = pos; i < pos + hlen; i++ ) {
memcpy(&nodes[i], node, sizeof(struct radix_node));
nodes[i].left = NULL;
nodes[i].right = NULL;
}
}
/* Right */
if ( node->right ) {
_parse_triangle(node->right, vector, nodes, pos + hlen, depth + 1);
} else {
for ( i = pos + hlen; i < pos + hlen * 2; i++ ) {
memcpy(&nodes[i], node, sizeof(struct radix_node));
nodes[i].left = NULL;
nodes[i].right = NULL;
}
}
}
/*
* Clear all the marks
*/
static void
_clear_mark(struct radix_node *node)
{
if ( !node->mark ) {
return;
}
node->mark = 0;
if ( node->left ) {
_clear_mark(node->left);
}
if ( node->right ) {
_clear_mark(node->right);
}
}
/*
* Update and clean from the specified node
*/
static void
_update_clean_node(struct poptrie *poptrie, poptrie_node_t *node, int oinode)
{
int i;
int n;
if ( oinode < 0 ) {
return;
}
n = 0;
for ( i = 0; i < (1 << 6); i++ ) {
if ( VEC_BT(node->vector, i) ) {