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| author | Jarek Poplawski <jarkao2@gmail.com> | 2008-04-12 18:37:13 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-04-12 18:37:13 -0700 |
| commit | e56cfad132f2ae269082359d279c17230c987e74 (patch) | |
| tree | 6867ab5499fe617a16b15f1572b5d22d863d2524 /net | |
| parent | 028b027524b162eef90839a92ba4b8bddf23e06c (diff) | |
| download | linux-stable-e56cfad132f2ae269082359d279c17230c987e74.tar.gz linux-stable-e56cfad132f2ae269082359d279c17230c987e74.tar.bz2 linux-stable-e56cfad132f2ae269082359d279c17230c987e74.zip | |
[NET_SCHED] cls_u32: refcounting fix for u32_delete()
Deleting of nonroot hnodes mostly doesn't work in u32_delete():
refcnt == 1 is expected, but such hnodes' refcnts are initialized
with 0 and charged only with "link" nodes. Now they'll start with
1 like usual. Thanks to Patrick McHardy for an improving suggestion.
Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Acked-by: Jamal Hadi Salim <hadi@cyberus.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/sched/cls_u32.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/net/sched/cls_u32.c b/net/sched/cls_u32.c index c5c16b4b6e98..4d755444c449 100644 --- a/net/sched/cls_u32.c +++ b/net/sched/cls_u32.c @@ -411,8 +411,10 @@ static void u32_destroy(struct tcf_proto *tp) } } - for (ht=tp_c->hlist; ht; ht = ht->next) + for (ht = tp_c->hlist; ht; ht = ht->next) { + ht->refcnt--; u32_clear_hnode(tp, ht); + } while ((ht = tp_c->hlist) != NULL) { tp_c->hlist = ht->next; @@ -441,8 +443,12 @@ static int u32_delete(struct tcf_proto *tp, unsigned long arg) if (tp->root == ht) return -EINVAL; - if (--ht->refcnt == 0) + if (ht->refcnt == 1) { + ht->refcnt--; u32_destroy_hnode(tp, ht); + } else { + return -EBUSY; + } return 0; } @@ -568,7 +574,7 @@ static int u32_change(struct tcf_proto *tp, unsigned long base, u32 handle, if (ht == NULL) return -ENOBUFS; ht->tp_c = tp_c; - ht->refcnt = 0; + ht->refcnt = 1; ht->divisor = divisor; ht->handle = handle; ht->prio = tp->prio; |