diff options
author | Patrick McHardy <kaber@trash.net> | 2007-02-12 11:12:57 -0800 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2007-02-12 11:12:57 -0800 |
commit | 923f4902fefdf4e89b0fb32c4e069d4f57d704f5 (patch) | |
tree | 2fad9f83c0e6da178f5167f6efb2b75cbe28c68e /net/netfilter/nf_conntrack_core.c | |
parent | 642d628b2c92e5283bbd3c849c7099c64ab68856 (diff) |
[NETFILTER]: nf_conntrack: properly use RCU API for nf_ct_protos/nf_ct_l3protos arrays
Replace preempt_{enable,disable} based RCU by proper use of the
RCU API and add missing rcu_read_lock/rcu_read_unlock calls in
all paths not obviously only used within packet process context
(nfnetlink_conntrack).
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/netfilter/nf_conntrack_core.c')
-rw-r--r-- | net/netfilter/nf_conntrack_core.c | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index 59bcab1d108..3deeb900263 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -332,13 +332,16 @@ destroy_conntrack(struct nf_conntrack *nfct) /* To make sure we don't get any weird locking issues here: * destroy_conntrack() MUST NOT be called with a write lock * to nf_conntrack_lock!!! -HW */ + rcu_read_lock(); l3proto = __nf_ct_l3proto_find(ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.l3num); if (l3proto && l3proto->destroy) l3proto->destroy(ct); - l4proto = __nf_ct_l4proto_find(ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.l3num, ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.protonum); + l4proto = __nf_ct_l4proto_find(ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.l3num, + ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.protonum); if (l4proto && l4proto->destroy) l4proto->destroy(ct); + rcu_read_unlock(); if (nf_conntrack_destroyed) nf_conntrack_destroyed(ct); @@ -647,9 +650,14 @@ struct nf_conn *nf_conntrack_alloc(const struct nf_conntrack_tuple *orig, const struct nf_conntrack_tuple *repl) { struct nf_conntrack_l3proto *l3proto; + struct nf_conn *ct; + rcu_read_lock(); l3proto = __nf_ct_l3proto_find(orig->src.l3num); - return __nf_conntrack_alloc(orig, repl, l3proto, 0); + ct = __nf_conntrack_alloc(orig, repl, l3proto, 0); + rcu_read_unlock(); + + return ct; } EXPORT_SYMBOL_GPL(nf_conntrack_alloc); @@ -817,7 +825,9 @@ nf_conntrack_in(int pf, unsigned int hooknum, struct sk_buff **pskb) return NF_ACCEPT; } + /* rcu_read_lock()ed by nf_hook_slow */ l3proto = __nf_ct_l3proto_find((u_int16_t)pf); + if ((ret = l3proto->prepare(pskb, hooknum, &dataoff, &protonum)) <= 0) { DEBUGP("not prepared to track yet or error occured\n"); return -ret; @@ -872,10 +882,15 @@ EXPORT_SYMBOL_GPL(nf_conntrack_in); int nf_ct_invert_tuplepr(struct nf_conntrack_tuple *inverse, const struct nf_conntrack_tuple *orig) { - return nf_ct_invert_tuple(inverse, orig, - __nf_ct_l3proto_find(orig->src.l3num), - __nf_ct_l4proto_find(orig->src.l3num, - orig->dst.protonum)); + int ret; + + rcu_read_lock(); + ret = nf_ct_invert_tuple(inverse, orig, + __nf_ct_l3proto_find(orig->src.l3num), + __nf_ct_l4proto_find(orig->src.l3num, + orig->dst.protonum)); + rcu_read_unlock(); + return ret; } EXPORT_SYMBOL_GPL(nf_ct_invert_tuplepr); |