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[IPV4]: fib_trie RCU refinements 

* This patch is from Paul McKenney's RCU reviewing. 

Signed-off-by: Robert Olsson <robert.olsson@its.uu.se>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Robert Olsson 2005-09-19 15:31:18 -07:00 committed by David S. Miller
parent 1d25cd6cc2
commit 772cb712b1
1 changed files with 10 additions and 11 deletions
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21
net/ipv4/fib_trie.c
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@ -43,7 +43,7 @@
* 2 of the License, or (at your option) any later version.
*/
#define VERSION "0.403"
#define VERSION "0.404"
#include <linux/config.h>
#include <asm/uaccess.h>
@ -224,7 +224,7 @@ static inline int tkey_mismatch(t_key a, int offset, t_key b)
Consider a node 'n' and its parent 'tp'.
If n is a leaf, every bit in its key is significant. Its presence is
necessitaded by path compression, since during a tree traversal (when
necessitated by path compression, since during a tree traversal (when
searching for a leaf - unless we are doing an insertion) we will completely
ignore all skipped bits we encounter. Thus we need to verify, at the end of
a potentially successful search, that we have indeed been walking the
@ -836,11 +836,12 @@ static void trie_init(struct trie *t)
#endif
}
/* readside most use rcu_read_lock currently dump routines
/* readside must use rcu_read_lock currently dump routines
via get_fa_head and dump */
static struct leaf_info *find_leaf_info(struct hlist_head *head, int plen)
static struct leaf_info *find_leaf_info(struct leaf *l, int plen)
{
struct hlist_head *head = &l->list;
struct hlist_node *node;
struct leaf_info *li;
@ -853,7 +854,7 @@ static struct leaf_info *find_leaf_info(struct hlist_head *head, int plen)
static inline struct list_head * get_fa_head(struct leaf *l, int plen)
{
struct leaf_info *li = find_leaf_info(&l->list, plen);
struct leaf_info *li = find_leaf_info(l, plen);
if (!li)
return NULL;
@ -1248,7 +1249,7 @@ err:
}
/* should be clalled with rcu_read_lock */
/* should be called with rcu_read_lock */
static inline int check_leaf(struct trie *t, struct leaf *l,
t_key key, int *plen, const struct flowi *flp,
struct fib_result *res)
@ -1590,7 +1591,7 @@ fn_trie_delete(struct fib_table *tb, struct rtmsg *r, struct kern_rta *rta,
rtmsg_fib(RTM_DELROUTE, htonl(key), fa, plen, tb->tb_id, nlhdr, req);
l = fib_find_node(t, key);
li = find_leaf_info(&l->list, plen);
li = find_leaf_info(l, plen);
list_del_rcu(&fa->fa_list);
@ -1714,7 +1715,6 @@ static int fn_trie_flush(struct fib_table *tb)
t->revision++;
rcu_read_lock();
for (h = 0; (l = nextleaf(t, l)) != NULL; h++) {
found += trie_flush_leaf(t, l);
@ -1722,7 +1722,6 @@ static int fn_trie_flush(struct fib_table *tb)
trie_leaf_remove(t, ll->key);
ll = l;
}
rcu_read_unlock();
if (ll && hlist_empty(&ll->list))
trie_leaf_remove(t, ll->key);
@ -2288,7 +2287,7 @@ static int fib_trie_seq_show(struct seq_file *seq, void *v)
seq_indent(seq, iter->depth);
seq_printf(seq, " |-- %d.%d.%d.%d\n", NIPQUAD(val));
for (i = 32; i >= 0; i--) {
struct leaf_info *li = find_leaf_info(&l->list, i);
struct leaf_info *li = find_leaf_info(l, i);
if (li) {
struct fib_alias *fa;
list_for_each_entry_rcu(fa, &li->falh, fa_list) {
@ -2384,7 +2383,7 @@ static int fib_route_seq_show(struct seq_file *seq, void *v)
return 0;
for (i=32; i>=0; i--) {
struct leaf_info *li = find_leaf_info(&l->list, i);
struct leaf_info *li = find_leaf_info(l, i);
struct fib_alias *fa;
u32 mask, prefix;