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Message-Id: <1429954020-11763-6-git-send-email-ipm@chirality.org.uk>
Date: Sat, 25 Apr 2015 10:26:59 +0100
From: Ian Morris <ipm@...rality.org.uk>
To: netdev@...r.kernel.org
Cc: Ian Morris <ipm@...rality.org.uk>
Subject: [PATCH net-next 5/6] ipv6: netfilter: comparison for inequality with NULL
The code uses a mixture of coding styles. In some instances check for NULL
pointer is done as x != NULL and sometimes as x. x is preferred
according to checkpatch and this patch makes the code consistent by
adopting the latter form.
No changes detected by objdiff.
Signed-off-by: Ian Morris <ipm@...rality.org.uk>
---
net/ipv6/netfilter/ip6_tables.c | 4 ++--
net/ipv6/netfilter/ip6t_REJECT.c | 2 +-
net/ipv6/netfilter/ip6t_ah.c | 16 ++++++++--------
net/ipv6/netfilter/ip6t_frag.c | 24 ++++++++++++------------
net/ipv6/netfilter/ip6t_hbh.c | 7 +++----
net/ipv6/netfilter/nf_conntrack_reasm.c | 2 +-
net/ipv6/netfilter/nf_log_ipv6.c | 4 ++--
net/ipv6/netfilter/nft_reject_ipv6.c | 2 +-
8 files changed, 30 insertions(+), 31 deletions(-)
diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
index ce8c529..ed3612d 100644
--- a/net/ipv6/netfilter/ip6_tables.c
+++ b/net/ipv6/netfilter/ip6_tables.c
@@ -570,7 +570,7 @@ static void cleanup_match(struct xt_entry_match *m, struct net *net)
par.match = m->u.kernel.match;
par.matchinfo = m->data;
par.family = NFPROTO_IPV6;
- if (par.match->destroy != NULL)
+ if (par.match->destroy)
par.match->destroy(&par);
module_put(par.match->me);
}
@@ -793,7 +793,7 @@ static void cleanup_entry(struct ip6t_entry *e, struct net *net)
par.target = t->u.kernel.target;
par.targinfo = t->data;
par.family = NFPROTO_IPV6;
- if (par.target->destroy != NULL)
+ if (par.target->destroy)
par.target->destroy(&par);
module_put(par.target->me);
}
diff --git a/net/ipv6/netfilter/ip6t_REJECT.c b/net/ipv6/netfilter/ip6t_REJECT.c
index 12331ef..9003a99 100644
--- a/net/ipv6/netfilter/ip6t_REJECT.c
+++ b/net/ipv6/netfilter/ip6t_REJECT.c
@@ -40,7 +40,7 @@ static unsigned int
reject_tg6(struct sk_buff *skb, const struct xt_action_param *par)
{
const struct ip6t_reject_info *reject = par->targinfo;
- struct net *net = dev_net((par->in != NULL) ? par->in : par->out);
+ struct net *net = dev_net(par->in ? par->in : par->out);
pr_debug("%s: medium point\n", __func__);
switch (reject->with) {
diff --git a/net/ipv6/netfilter/ip6t_ah.c b/net/ipv6/netfilter/ip6t_ah.c
index e504376..490a4b1 100644
--- a/net/ipv6/netfilter/ip6t_ah.c
+++ b/net/ipv6/netfilter/ip6t_ah.c
@@ -77,14 +77,14 @@ static bool ah_mt6(const struct sk_buff *skb, struct xt_action_param *par)
ahinfo->hdrres, ah->reserved,
!(ahinfo->hdrres && ah->reserved));
- return (ah != NULL) &&
- spi_match(ahinfo->spis[0], ahinfo->spis[1],
- ntohl(ah->spi),
- !!(ahinfo->invflags & IP6T_AH_INV_SPI)) &&
- (!ahinfo->hdrlen ||
- (ahinfo->hdrlen == hdrlen) ^
- !!(ahinfo->invflags & IP6T_AH_INV_LEN)) &&
- !(ahinfo->hdrres && ah->reserved);
+ return ah &&
+ spi_match(ahinfo->spis[0], ahinfo->spis[1],
+ ntohl(ah->spi),
+ !!(ahinfo->invflags & IP6T_AH_INV_SPI)) &&
+ (!ahinfo->hdrlen ||
+ (ahinfo->hdrlen == hdrlen) ^
+ !!(ahinfo->invflags & IP6T_AH_INV_LEN)) &&
+ !(ahinfo->hdrres && ah->reserved);
}
static int ah_mt6_check(const struct xt_mtchk_param *par)
diff --git a/net/ipv6/netfilter/ip6t_frag.c b/net/ipv6/netfilter/ip6t_frag.c
index 0e14438..a67c2c2 100644
--- a/net/ipv6/netfilter/ip6t_frag.c
+++ b/net/ipv6/netfilter/ip6t_frag.c
@@ -88,18 +88,18 @@ frag_mt6(const struct sk_buff *skb, struct xt_action_param *par)
!((fraginfo->flags & IP6T_FRAG_NMF) &&
(ntohs(fh->frag_off) & IP6_MF)));
- return (fh != NULL) &&
- id_match(fraginfo->ids[0], fraginfo->ids[1],
- ntohl(fh->identification),
- !!(fraginfo->invflags & IP6T_FRAG_INV_IDS)) &&
- !((fraginfo->flags & IP6T_FRAG_RES) &&
- (fh->reserved || (ntohs(fh->frag_off) & 0x6))) &&
- !((fraginfo->flags & IP6T_FRAG_FST) &&
- (ntohs(fh->frag_off) & ~0x7)) &&
- !((fraginfo->flags & IP6T_FRAG_MF) &&
- !(ntohs(fh->frag_off) & IP6_MF)) &&
- !((fraginfo->flags & IP6T_FRAG_NMF) &&
- (ntohs(fh->frag_off) & IP6_MF));
+ return fh &&
+ id_match(fraginfo->ids[0], fraginfo->ids[1],
+ ntohl(fh->identification),
+ !!(fraginfo->invflags & IP6T_FRAG_INV_IDS)) &&
+ !((fraginfo->flags & IP6T_FRAG_RES) &&
+ (fh->reserved || (ntohs(fh->frag_off) & 0x6))) &&
+ !((fraginfo->flags & IP6T_FRAG_FST) &&
+ (ntohs(fh->frag_off) & ~0x7)) &&
+ !((fraginfo->flags & IP6T_FRAG_MF) &&
+ !(ntohs(fh->frag_off) & IP6_MF)) &&
+ !((fraginfo->flags & IP6T_FRAG_NMF) &&
+ (ntohs(fh->frag_off) & IP6_MF));
}
static int frag_mt6_check(const struct xt_mtchk_param *par)
diff --git a/net/ipv6/netfilter/ip6t_hbh.c b/net/ipv6/netfilter/ip6t_hbh.c
index fc6af64..a99313f 100644
--- a/net/ipv6/netfilter/ip6t_hbh.c
+++ b/net/ipv6/netfilter/ip6t_hbh.c
@@ -89,10 +89,9 @@ hbh_mt6(const struct sk_buff *skb, struct xt_action_param *par)
((optinfo->hdrlen == hdrlen) ^
!!(optinfo->invflags & IP6T_OPTS_INV_LEN))));
- ret = (oh != NULL) &&
- (!(optinfo->flags & IP6T_OPTS_LEN) ||
- ((optinfo->hdrlen == hdrlen) ^
- !!(optinfo->invflags & IP6T_OPTS_INV_LEN)));
+ ret = oh && (!(optinfo->flags & IP6T_OPTS_LEN) ||
+ ((optinfo->hdrlen == hdrlen) ^
+ !!(optinfo->invflags & IP6T_OPTS_INV_LEN)));
ptr += 2;
hdrlen -= 2;
diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c
index 51478de..0c6faf1 100644
--- a/net/ipv6/netfilter/nf_conntrack_reasm.c
+++ b/net/ipv6/netfilter/nf_conntrack_reasm.c
@@ -304,7 +304,7 @@ static int nf_ct_frag6_queue(struct frag_queue *fq, struct sk_buff *skb,
goto found;
}
prev = NULL;
- for (next = fq->q.fragments; next != NULL; next = next->next) {
+ for (next = fq->q.fragments; next; next = next->next) {
if (NFCT_FRAG6_CB(next)->offset >= offset)
break; /* bingo! */
prev = next;
diff --git a/net/ipv6/netfilter/nf_log_ipv6.c b/net/ipv6/netfilter/nf_log_ipv6.c
index 35166a2..de3eaf5 100644
--- a/net/ipv6/netfilter/nf_log_ipv6.c
+++ b/net/ipv6/netfilter/nf_log_ipv6.c
@@ -323,7 +323,7 @@ fallback:
p = NULL;
}
- if (p != NULL) {
+ if (p) {
nf_log_buf_add(m, "%02x", *p++);
for (i = 1; i < len; i++)
nf_log_buf_add(m, ":%02x", *p++);
@@ -362,7 +362,7 @@ static void nf_log_ip6_packet(struct net *net, u_int8_t pf,
nf_log_dump_packet_common(m, pf, hooknum, skb, in, out,
loginfo, prefix);
- if (in != NULL)
+ if (in)
dump_ipv6_mac_header(m, loginfo, skb);
dump_ipv6_packet(m, loginfo, skb, skb_network_offset(skb), 1);
diff --git a/net/ipv6/netfilter/nft_reject_ipv6.c b/net/ipv6/netfilter/nft_reject_ipv6.c
index d0d1540..d282995 100644
--- a/net/ipv6/netfilter/nft_reject_ipv6.c
+++ b/net/ipv6/netfilter/nft_reject_ipv6.c
@@ -24,7 +24,7 @@ static void nft_reject_ipv6_eval(const struct nft_expr *expr,
const struct nft_pktinfo *pkt)
{
struct nft_reject *priv = nft_expr_priv(expr);
- struct net *net = dev_net((pkt->in != NULL) ? pkt->in : pkt->out);
+ struct net *net = dev_net(pkt->in ? pkt->in : pkt->out);
switch (priv->type) {
case NFT_REJECT_ICMP_UNREACH:
--
1.9.1
--
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