diff options
Diffstat (limited to 'net/netfilter/nf_tables_api.c')
| -rw-r--r-- | net/netfilter/nf_tables_api.c | 74 |
1 files changed, 43 insertions, 31 deletions
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index 17df4b807f84..34aa3d507542 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -105,7 +105,8 @@ static void nft_ctx_init(struct nft_ctx *ctx, ctx->nla = nla; } -static struct nft_trans *nft_trans_alloc(struct nft_ctx *ctx, u32 size) +static struct nft_trans *nft_trans_alloc(struct nft_ctx *ctx, int msg_type, + u32 size) { struct nft_trans *trans; @@ -113,6 +114,7 @@ static struct nft_trans *nft_trans_alloc(struct nft_ctx *ctx, u32 size) if (trans == NULL) return NULL; + trans->msg_type = msg_type; trans->ctx = *ctx; return trans; @@ -1576,12 +1578,12 @@ static void nf_tables_rule_destroy(const struct nft_ctx *ctx, kfree(rule); } -static struct nft_trans *nft_trans_rule_add(struct nft_ctx *ctx, +static struct nft_trans *nft_trans_rule_add(struct nft_ctx *ctx, int msg_type, struct nft_rule *rule) { struct nft_trans *trans; - trans = nft_trans_alloc(ctx, sizeof(struct nft_trans_rule)); + trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_rule)); if (trans == NULL) return NULL; @@ -1703,7 +1705,8 @@ static int nf_tables_newrule(struct sock *nlsk, struct sk_buff *skb, if (nlh->nlmsg_flags & NLM_F_REPLACE) { if (nft_rule_is_active_next(net, old_rule)) { - trans = nft_trans_rule_add(&ctx, old_rule); + trans = nft_trans_rule_add(&ctx, NFT_MSG_NEWRULE, + old_rule); if (trans == NULL) { err = -ENOMEM; goto err2; @@ -1726,7 +1729,7 @@ static int nf_tables_newrule(struct sock *nlsk, struct sk_buff *skb, list_add_rcu(&rule->list, &chain->rules); } - if (nft_trans_rule_add(&ctx, rule) == NULL) { + if (nft_trans_rule_add(&ctx, NFT_MSG_NEWRULE, rule) == NULL) { err = -ENOMEM; goto err3; } @@ -1754,7 +1757,7 @@ nf_tables_delrule_one(struct nft_ctx *ctx, struct nft_rule *rule) { /* You cannot delete the same rule twice */ if (nft_rule_is_active_next(ctx->net, rule)) { - if (nft_trans_rule_add(ctx, rule) == NULL) + if (nft_trans_rule_add(ctx, NFT_MSG_DELRULE, rule) == NULL) return -ENOMEM; nft_rule_disactivate_next(ctx->net, rule); return 0; @@ -3114,28 +3117,26 @@ static int nf_tables_commit(struct sk_buff *skb) synchronize_rcu(); list_for_each_entry_safe(trans, next, &net->nft.commit_list, list) { - /* This rule was inactive in the past and just became active. - * Clear the next bit of the genmask since its meaning has - * changed, now it is the future. - */ - if (nft_rule_is_active(net, nft_trans_rule(trans))) { - nft_rule_clear(net, nft_trans_rule(trans)); - nf_tables_rule_notify(skb, trans->ctx.nlh, + switch (trans->msg_type) { + case NFT_MSG_NEWRULE: + nft_rule_clear(trans->ctx.net, nft_trans_rule(trans)); + nf_tables_rule_notify(trans->ctx.skb, trans->ctx.nlh, trans->ctx.table, trans->ctx.chain, nft_trans_rule(trans), NFT_MSG_NEWRULE, 0, trans->ctx.afi->family); nft_trans_destroy(trans); - continue; + break; + case NFT_MSG_DELRULE: + list_del_rcu(&nft_trans_rule(trans)->list); + nf_tables_rule_notify(trans->ctx.skb, trans->ctx.nlh, + trans->ctx.table, + trans->ctx.chain, + nft_trans_rule(trans), NFT_MSG_DELRULE, 0, + trans->ctx.afi->family); + break; } - - /* This rule is in the past, get rid of it */ - list_del_rcu(&nft_trans_rule(trans)->list); - nf_tables_rule_notify(skb, trans->ctx.nlh, - trans->ctx.table, trans->ctx.chain, - nft_trans_rule(trans), NFT_MSG_DELRULE, - 0, trans->ctx.afi->family); } /* Make sure we don't see any packet traversing old rules */ @@ -3143,8 +3144,13 @@ static int nf_tables_commit(struct sk_buff *skb) /* Now we can safely release unused old rules */ list_for_each_entry_safe(trans, next, &net->nft.commit_list, list) { - nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans)); - nft_trans_destroy(trans); + switch (trans->msg_type) { + case NFT_MSG_DELRULE: + nf_tables_rule_destroy(&trans->ctx, + nft_trans_rule(trans)); + nft_trans_destroy(trans); + break; + } } return 0; @@ -3156,22 +3162,28 @@ static int nf_tables_abort(struct sk_buff *skb) struct nft_trans *trans, *next; list_for_each_entry_safe(trans, next, &net->nft.commit_list, list) { - if (!nft_rule_is_active_next(net, nft_trans_rule(trans))) { - nft_rule_clear(net, nft_trans_rule(trans)); + switch (trans->msg_type) { + case NFT_MSG_NEWRULE: + list_del_rcu(&nft_trans_rule(trans)->list); + break; + case NFT_MSG_DELRULE: + nft_rule_clear(trans->ctx.net, nft_trans_rule(trans)); nft_trans_destroy(trans); - continue; + break; } - - /* This rule is inactive, get rid of it */ - list_del_rcu(&nft_trans_rule(trans)->list); } /* Make sure we don't see any packet accessing aborted rules */ synchronize_rcu(); list_for_each_entry_safe(trans, next, &net->nft.commit_list, list) { - nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans)); - nft_trans_destroy(trans); + switch (trans->msg_type) { + case NFT_MSG_NEWRULE: + nf_tables_rule_destroy(&trans->ctx, + nft_trans_rule(trans)); + nft_trans_destroy(trans); + break; + } } return 0; |