Change the pneigh_entry table to hlist from list.h
to allow for easier later conversion to RCU.
Signed-off-by: Stephen Hemminger <[EMAIL PROTECTED]>
---
include/net/neighbour.h | 6 ++--
net/core/neighbour.c | 58 ++++++++++++++++++++++++------------------------
2 files changed, 33 insertions(+), 31 deletions(-)
--- net-2.6.19.orig/include/net/neighbour.h
+++ net-2.6.19/include/net/neighbour.h
@@ -124,8 +124,8 @@ struct neigh_ops
struct pneigh_entry
{
- struct pneigh_entry *next;
- struct net_device *dev;
+ struct hlist_node hlist;
+ struct net_device *dev;
u8 key[0];
};
@@ -165,7 +165,7 @@ struct neigh_table
unsigned int hash_mask;
__u32 hash_rnd;
unsigned int hash_chain_gc;
- struct pneigh_entry **phash_buckets;
+ struct hlist_head *phash_buckets;
#ifdef CONFIG_PROC_FS
struct proc_dir_entry *pde;
#endif
--- net-2.6.19.orig/net/core/neighbour.c
+++ net-2.6.19/net/core/neighbour.c
@@ -455,6 +455,7 @@ struct pneigh_entry * pneigh_lookup(stru
struct net_device *dev, int creat)
{
struct pneigh_entry *n;
+ struct hlist_node *tmp;
int key_len = tbl->key_len;
u32 hash_val = *(u32 *)(pkey + key_len - 4);
@@ -465,7 +466,7 @@ struct pneigh_entry * pneigh_lookup(stru
read_lock_bh(&tbl->lock);
- for (n = tbl->phash_buckets[hash_val]; n; n = n->next) {
+ hlist_for_each_entry(n, tmp, &tbl->phash_buckets[hash_val], hlist) {
if (!memcmp(n->key, pkey, key_len) &&
(n->dev == dev || !n->dev)) {
read_unlock_bh(&tbl->lock);
@@ -495,8 +496,7 @@ struct pneigh_entry * pneigh_lookup(stru
}
write_lock_bh(&tbl->lock);
- n->next = tbl->phash_buckets[hash_val];
- tbl->phash_buckets[hash_val] = n;
+ hlist_add_head(&n->hlist, &tbl->phash_buckets[hash_val]);
write_unlock_bh(&tbl->lock);
out:
return n;
@@ -506,7 +506,8 @@ out:
int pneigh_delete(struct neigh_table *tbl, const void *pkey,
struct net_device *dev)
{
- struct pneigh_entry *n, **np;
+ struct pneigh_entry *n;
+ struct hlist_node *tmp;
int key_len = tbl->key_len;
u32 hash_val = *(u32 *)(pkey + key_len - 4);
@@ -516,10 +517,9 @@ int pneigh_delete(struct neigh_table *tb
hash_val &= PNEIGH_HASHMASK;
write_lock_bh(&tbl->lock);
- for (np = &tbl->phash_buckets[hash_val]; (n = *np) != NULL;
- np = &n->next) {
+ hlist_for_each_entry(n, tmp, &tbl->phash_buckets[hash_val], hlist) {
if (!memcmp(n->key, pkey, key_len) && n->dev == dev) {
- *np = n->next;
+ hlist_del(&n->hlist);
write_unlock_bh(&tbl->lock);
if (tbl->pdestructor)
tbl->pdestructor(n);
@@ -535,22 +535,21 @@ int pneigh_delete(struct neigh_table *tb
static int pneigh_ifdown(struct neigh_table *tbl, struct net_device *dev)
{
- struct pneigh_entry *n, **np;
u32 h;
for (h = 0; h <= PNEIGH_HASHMASK; h++) {
- np = &tbl->phash_buckets[h];
- while ((n = *np) != NULL) {
+ struct pneigh_entry *n;
+ struct hlist_node *tmp, *nxt;
+
+ hlist_for_each_entry_safe(n, tmp, nxt, &tbl->phash_buckets[h],
hlist) {
if (!dev || n->dev == dev) {
- *np = n->next;
+ hlist_del(&n->hlist);
if (tbl->pdestructor)
tbl->pdestructor(n);
if (n->dev)
dev_put(n->dev);
kfree(n);
- continue;
}
- np = &n->next;
}
}
return -ENOENT;
@@ -1332,7 +1331,6 @@ void neigh_parms_destroy(struct neigh_pa
void neigh_table_init_no_netlink(struct neigh_table *tbl)
{
unsigned long now = jiffies;
- unsigned long phsize;
atomic_set(&tbl->parms.refcnt, 1);
INIT_RCU_HEAD(&tbl->parms.rcu_head);
@@ -1363,8 +1361,8 @@ void neigh_table_init_no_netlink(struct
tbl->hash_mask = 1;
tbl->hash_buckets = neigh_hash_alloc(tbl->hash_mask + 1);
- phsize = (PNEIGH_HASHMASK + 1) * sizeof(struct pneigh_entry *);
- tbl->phash_buckets = kzalloc(phsize, GFP_KERNEL);
+ tbl->phash_buckets = kcalloc(PNEIGH_HASHMASK + 1, sizeof(struct
hlist_head),
+ GFP_KERNEL);
if (!tbl->hash_buckets || !tbl->phash_buckets)
panic("cannot allocate neighbour cache hashes");
@@ -2192,18 +2190,18 @@ static struct pneigh_entry *pneigh_get_f
{
struct neigh_seq_state *state = seq->private;
struct neigh_table *tbl = state->tbl;
- struct pneigh_entry *pn = NULL;
+ struct hlist_node *pn = NULL;
int bucket = state->bucket;
state->flags |= NEIGH_SEQ_IS_PNEIGH;
for (bucket = 0; bucket <= PNEIGH_HASHMASK; bucket++) {
- pn = tbl->phash_buckets[bucket];
+ pn = tbl->phash_buckets[bucket].first;
if (pn)
break;
}
state->bucket = bucket;
- return pn;
+ return pn ? hlist_entry(pn, struct pneigh_entry, hlist) : NULL;
}
static struct pneigh_entry *pneigh_get_next(struct seq_file *seq,
@@ -2212,20 +2210,24 @@ static struct pneigh_entry *pneigh_get_n
{
struct neigh_seq_state *state = seq->private;
struct neigh_table *tbl = state->tbl;
+ struct hlist_node *tmp = &pn->hlist;
- pn = pn->next;
- while (!pn) {
- if (++state->bucket > PNEIGH_HASHMASK)
- break;
- pn = tbl->phash_buckets[state->bucket];
- if (pn)
- break;
+ tmp = tmp->next;
+ if (tmp)
+ goto found;
+
+ while (++state->bucket < PNEIGH_HASHMASK) {
+ tmp = tbl->phash_buckets[state->bucket].first;
+ if (tmp)
+ goto found;
}
+ return NULL;
- if (pn && pos)
+found:
+ if (pos)
--(*pos);
- return pn;
+ return hlist_entry(tmp, struct pneigh_entry, hlist);
}
static struct pneigh_entry *pneigh_get_idx(struct seq_file *seq, loff_t *pos)
--
-
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