From: Pablo Neira Ayuso <pablo@netfilter.org>
To: netfilter-devel@vger.kernel.org
Cc: davem@davemloft.net, netdev@vger.kernel.org
Subject: [PATCH 15/25] netfilter: nf_tables: add message type to transactions
Date: Wed, 21 May 2014 11:43:12 +0200 [thread overview]
Message-ID: <1400665402-5835-15-git-send-email-pablo@netfilter.org> (raw)
In-Reply-To: <1400665402-5835-1-git-send-email-pablo@netfilter.org>
The patch adds message type to the transaction to simplify the
commit the and abort routines. Yet another step forward in the
generalisation of the transaction infrastructure.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
include/net/netfilter/nf_tables.h | 2 +
net/netfilter/nf_tables_api.c | 74 +++++++++++++++++++++----------------
2 files changed, 45 insertions(+), 31 deletions(-)
diff --git a/include/net/netfilter/nf_tables.h b/include/net/netfilter/nf_tables.h
index 246dbd4..d8dfb26 100644
--- a/include/net/netfilter/nf_tables.h
+++ b/include/net/netfilter/nf_tables.h
@@ -390,11 +390,13 @@ struct nft_rule {
* struct nft_trans - nf_tables object update in transaction
*
* @list: used internally
+ * @msg_type: message type
* @ctx: transaction context
* @data: internal information related to the transaction
*/
struct nft_trans {
struct list_head list;
+ int msg_type;
struct nft_ctx ctx;
char data[0];
};
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 17df4b8..34aa3d5 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;
--
1.7.10.4
next prev parent reply other threads:[~2014-05-21 9:43 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-21 9:42 [PATCH 00/25] Netfilter/nftables updates for net-next Pablo Neira Ayuso
2014-05-21 9:42 ` [PATCH 01/25] netfilter: nft_ct: add missing ifdef for NFT_MARK setting Pablo Neira Ayuso
2014-05-21 9:43 ` [PATCH 02/25] netfilter: nft_meta: split nft_meta_init() into two functions for get/set Pablo Neira Ayuso
2014-05-21 9:43 ` [PATCH 03/25] netfilter: nft_ct: split nft_ct_init() " Pablo Neira Ayuso
2014-05-21 9:43 ` [PATCH 04/25] netfilter: nf_tables: implement proper set selection Pablo Neira Ayuso
2014-05-21 9:43 ` [PATCH 05/25] netfilter: nft_hash: use set global element counter instead of private one Pablo Neira Ayuso
2014-05-21 9:43 ` [PATCH 06/25] netfilter: nf_tables: add set_elem notifications Pablo Neira Ayuso
2014-05-21 9:43 ` [PATCH 07/25] netfilter: nf_tables: handle more than 8 * PAGE_SIZE set name allocations Pablo Neira Ayuso
2014-05-21 9:43 ` [PATCH 08/25] netfilter: nf_tables: Stack expression type depending on their family Pablo Neira Ayuso
2014-05-21 9:43 ` [PATCH 10/25] netfilter: nf_tables: Add meta expression key for bridge interface name Pablo Neira Ayuso
2014-05-21 9:43 ` [PATCH 11/25] netfilter: nf_tables: relax string validation of NFTA_CHAIN_TYPE Pablo Neira Ayuso
2014-05-21 9:43 ` [PATCH 12/25] netfilter: nf_tables: deconstify table and chain in context structure Pablo Neira Ayuso
2014-05-21 9:43 ` [PATCH 13/25] netfilter: nf_tables: generalise transaction infrastructure Pablo Neira Ayuso
2014-05-21 9:43 ` [PATCH 14/25] netfilter: nf_tables: relocate commit and abort routines in the source file Pablo Neira Ayuso
2014-05-21 9:43 ` Pablo Neira Ayuso [this message]
2014-05-21 9:43 ` [PATCH 16/25] netfilter: nf_tables: use new transaction infrastructure to handle sets Pablo Neira Ayuso
2014-05-21 9:43 ` [PATCH 17/25] netfilter: nf_tables: refactor chain statistic routines Pablo Neira Ayuso
2014-05-21 9:43 ` [PATCH 18/25] netfilter: nf_tables: use new transaction infrastructure to handle chain Pablo Neira Ayuso
2014-05-21 9:43 ` [PATCH 19/25] netfilter: nf_tables: disabling table hooks always succeeds Pablo Neira Ayuso
2014-05-21 9:43 ` [PATCH 20/25] netfilter: nf_tables: pass context to nf_tables_updtable() Pablo Neira Ayuso
2014-05-21 9:43 ` [PATCH 21/25] netfilter: nf_tables: use new transaction infrastructure to handle table Pablo Neira Ayuso
2014-05-21 9:43 ` [PATCH 22/25] netfilter: nf_tables: use new transaction infrastructure to handle elements Pablo Neira Ayuso
2014-05-21 9:43 ` [PATCH 23/25] netfilter: nf_tables: simplify nf_tables_*_notify Pablo Neira Ayuso
2014-05-21 9:43 ` [PATCH 24/25] netfilter: nf_tables: remove skb and nlh from context structure Pablo Neira Ayuso
2014-05-21 9:43 ` [PATCH 25/25] netfilter: nf_tables: defer all object release via rcu Pablo Neira Ayuso
2014-05-22 16:09 ` [PATCH 00/25] Netfilter/nftables updates for net-next David Miller
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