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Groups > linux.kernel > #1611221 > unrolled thread
| Started by | Arushi Singhal <arushisinghal19971997@gmail.com> |
|---|---|
| First post | 2017-03-28 19:00 +0200 |
| Last post | 2017-04-07 00:10 +0200 |
| Articles | 2 — 2 participants |
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[PATCH v3] net: netfilter: Add nfnl_msg_type() helper function Arushi Singhal <arushisinghal19971997@gmail.com> - 2017-03-28 19:00 +0200
Re: [Outreachy kernel] [PATCH v3] net: netfilter: Add nfnl_msg_type() helper function Pablo Neira Ayuso <pablo@netfilter.org> - 2017-04-07 00:10 +0200
| From | Arushi Singhal <arushisinghal19971997@gmail.com> |
|---|---|
| Date | 2017-03-28 19:00 +0200 |
| Subject | [PATCH v3] net: netfilter: Add nfnl_msg_type() helper function |
| Message-ID | <tq2Dn-22K-17@gated-at.bofh.it> |
To remove complexity of code the function is added in nfnetlink.h
to make code more clear and readable.
This is opencoded in a way that makes it error prone for future
netfilter netlink subsystems.
Signed-off-by: Arushi Singhal <arushisinghal19971997@gmail.com>
---
changes in v3
-make the subject more clear.
include/linux/netfilter/nfnetlink.h | 6 ++++++
net/netfilter/nf_conntrack_netlink.c | 12 +++++++-----
net/netfilter/nfnetlink_acct.c | 2 +-
net/netfilter/nfnetlink_cthelper.c | 2 +-
net/netfilter/nfnetlink_cttimeout.c | 4 ++--
5 files changed, 17 insertions(+), 9 deletions(-)
diff --git a/include/linux/netfilter/nfnetlink.h b/include/linux/netfilter/nfnetlink.h
index 1b49209dd5c7..9a36a7c3145d 100644
--- a/include/linux/netfilter/nfnetlink.h
+++ b/include/linux/netfilter/nfnetlink.h
@@ -50,6 +50,12 @@ static inline bool lockdep_nfnl_is_held(__u8 subsys_id)
{
return true;
}
+
+static inline u16 nfnl_msg_type(u8 subsys, u8 msg_type)
+{
+ return subsys << 8 | msg_type;
+}
+
#endif /* CONFIG_PROVE_LOCKING */
/*
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index aa344c5868c5..67f6f88a3e92 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -467,7 +467,7 @@ ctnetlink_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
struct nlattr *nest_parms;
unsigned int flags = portid ? NLM_F_MULTI : 0, event;
- event = NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_NEW;
+ event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, IPCTNL_MSG_CT_NEW);
nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
if (nlh == NULL)
goto nlmsg_failure;
@@ -1983,7 +1983,8 @@ ctnetlink_ct_stat_cpu_fill_info(struct sk_buff *skb, u32 portid, u32 seq,
struct nfgenmsg *nfmsg;
unsigned int flags = portid ? NLM_F_MULTI : 0, event;
- event = NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_GET_STATS_CPU;
+ event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK,
+ IPCTNL_MSG_CT_GET_STATS_CPU);
nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
if (nlh == NULL)
goto nlmsg_failure;
@@ -2066,7 +2067,7 @@ ctnetlink_stat_ct_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
unsigned int flags = portid ? NLM_F_MULTI : 0, event;
unsigned int nr_conntracks = atomic_read(&net->ct.count);
- event = NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_GET_STATS;
+ event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, IPCTNL_MSG_CT_GET_STATS);
nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
if (nlh == NULL)
goto nlmsg_failure;
@@ -2576,7 +2577,7 @@ ctnetlink_exp_fill_info(struct sk_buff *skb, u32 portid, u32 seq,
struct nfgenmsg *nfmsg;
unsigned int flags = portid ? NLM_F_MULTI : 0;
- event |= NFNL_SUBSYS_CTNETLINK_EXP << 8;
+ event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK_EXP, event);
nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
if (nlh == NULL)
goto nlmsg_failure;
@@ -3223,7 +3224,8 @@ ctnetlink_exp_stat_fill_info(struct sk_buff *skb, u32 portid, u32 seq, int cpu,
struct nfgenmsg *nfmsg;
unsigned int flags = portid ? NLM_F_MULTI : 0, event;
- event = NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_EXP_GET_STATS_CPU;
+ event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK,
+ IPCTNL_MSG_EXP_GET_STATS_CPU);
nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
if (nlh == NULL)
goto nlmsg_failure;
diff --git a/net/netfilter/nfnetlink_acct.c b/net/netfilter/nfnetlink_acct.c
index d44d89b56127..ae0aef6cb7ee 100644
--- a/net/netfilter/nfnetlink_acct.c
+++ b/net/netfilter/nfnetlink_acct.c
@@ -138,7 +138,7 @@ nfnl_acct_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
u64 pkts, bytes;
u32 old_flags;
- event |= NFNL_SUBSYS_ACCT << 8;
+ event = nfnl_msg_type(NFNL_SUBSYS_ACCT, event);
nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
if (nlh == NULL)
goto nlmsg_failure;
diff --git a/net/netfilter/nfnetlink_cthelper.c b/net/netfilter/nfnetlink_cthelper.c
index de8782345c86..e2c443c43cb9 100644
--- a/net/netfilter/nfnetlink_cthelper.c
+++ b/net/netfilter/nfnetlink_cthelper.c
@@ -416,7 +416,7 @@ nfnl_cthelper_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
unsigned int flags = portid ? NLM_F_MULTI : 0;
int status;
- event |= NFNL_SUBSYS_CTHELPER << 8;
+ event = nfnl_msg_type(NFNL_SUBSYS_CTHELPER, event);
nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
if (nlh == NULL)
goto nlmsg_failure;
diff --git a/net/netfilter/nfnetlink_cttimeout.c b/net/netfilter/nfnetlink_cttimeout.c
index 139e0867e56e..6d76172117e4 100644
--- a/net/netfilter/nfnetlink_cttimeout.c
+++ b/net/netfilter/nfnetlink_cttimeout.c
@@ -158,7 +158,7 @@ ctnl_timeout_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
unsigned int flags = portid ? NLM_F_MULTI : 0;
struct nf_conntrack_l4proto *l4proto = timeout->l4proto;
- event |= NFNL_SUBSYS_CTNETLINK_TIMEOUT << 8;
+ event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK_TIMEOUT, event);
nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
if (nlh == NULL)
goto nlmsg_failure;
@@ -431,7 +431,7 @@ cttimeout_default_fill_info(struct net *net, struct sk_buff *skb, u32 portid,
struct nfgenmsg *nfmsg;
unsigned int flags = portid ? NLM_F_MULTI : 0;
- event |= NFNL_SUBSYS_CTNETLINK_TIMEOUT << 8;
+ event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK_TIMEOUT, event);
nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
if (nlh == NULL)
goto nlmsg_failure;
--
2.11.0
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| From | Pablo Neira Ayuso <pablo@netfilter.org> |
|---|---|
| Date | 2017-04-07 00:10 +0200 |
| Subject | Re: [Outreachy kernel] [PATCH v3] net: netfilter: Add nfnl_msg_type() helper function |
| Message-ID | <ttnLk-6Lg-5@gated-at.bofh.it> |
| In reply to | #1611221 |
[Multipart message — attachments visible in raw view] — view raw
Hi,
On Tue, Mar 28, 2017 at 10:27:32PM +0530, Arushi Singhal wrote:
> To remove complexity of code the function is added in nfnetlink.h
> to make code more clear and readable.
> This is opencoded in a way that makes it error prone for future
> netfilter netlink subsystems.
>
> Signed-off-by: Arushi Singhal <arushisinghal19971997@gmail.com>
> ---
> changes in v3
> -make the subject more clear.
>
> include/linux/netfilter/nfnetlink.h | 6 ++++++
> net/netfilter/nf_conntrack_netlink.c | 12 +++++++-----
> net/netfilter/nfnetlink_acct.c | 2 +-
> net/netfilter/nfnetlink_cthelper.c | 2 +-
> net/netfilter/nfnetlink_cttimeout.c | 4 ++--
> 5 files changed, 17 insertions(+), 9 deletions(-)
>
> diff --git a/include/linux/netfilter/nfnetlink.h b/include/linux/netfilter/nfnetlink.h
> index 1b49209dd5c7..9a36a7c3145d 100644
> --- a/include/linux/netfilter/nfnetlink.h
> +++ b/include/linux/netfilter/nfnetlink.h
> @@ -50,6 +50,12 @@ static inline bool lockdep_nfnl_is_held(__u8 subsys_id)
> {
> return true;
> }
> +
> +static inline u16 nfnl_msg_type(u8 subsys, u8 msg_type)
> +{
> + return subsys << 8 | msg_type;
> +}
This is not right. You have placed this new function definition inside
the CONFIG_PROVE_LOCKING.
So this is only defined iff CONFIG_PROVE_LOCKING is set on.
> #endif /* CONFIG_PROVE_LOCKING */
>
> /*
> diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
> index aa344c5868c5..67f6f88a3e92 100644
> --- a/net/netfilter/nf_conntrack_netlink.c
> +++ b/net/netfilter/nf_conntrack_netlink.c
> @@ -467,7 +467,7 @@ ctnetlink_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
> struct nlattr *nest_parms;
> unsigned int flags = portid ? NLM_F_MULTI : 0, event;
>
> - event = NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_NEW;
I can find many more spots to be replaced via:
git grep NFNL_SUBSYS_ net/netfilter/
Patch attached.
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