diff options
author | Al Viro <viro@zeniv.linux.org.uk> | 2014-11-19 13:02:53 -0500 |
---|---|---|
committer | Al Viro <viro@zeniv.linux.org.uk> | 2014-11-19 13:02:53 -0500 |
commit | 8ce74dd6057832618957fc2cbd38fa959c3a0a6c (patch) | |
tree | af3bede951087ebc58988ad073182a85bf899e27 /net/ipv4/netfilter | |
parent | 78d28e651f97866d608d9b41f8ad291e65d47dd5 (diff) | |
parent | 9761536e1d9e9e1f325fb04d4ad46b15a39eb94a (diff) |
Merge tag 'trace-seq-file-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace into for-next
Pull the beginning of seq_file cleanup from Steven:
"I'm looking to clean up the seq_file code and to eventually merge the
trace_seq code with seq_file as well, since they basically do the same thing.
Part of this process is to remove the return code of seq_printf() and friends
as they are rather inconsistent. It is better to use the new function
seq_has_overflowed() if you want to stop processing when the buffer
is full. Note, if the buffer is full, the seq_file code will throw away
the contents, allocate a bigger buffer, and then call your code again
to fill in the data. The only thing that breaking out of the function
early does is to save a little time which is probably never noticed.
I started with patches from Joe Perches and modified them as well.
There's many more places that need to be updated before we can convert
seq_printf() and friends to return void. But this patch set introduces
the seq_has_overflowed() and does some initial updates."
Diffstat (limited to 'net/ipv4/netfilter')
-rw-r--r-- | net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c | 6 | ||||
-rw-r--r-- | net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c | 53 | ||||
-rw-r--r-- | net/ipv4/netfilter/nf_conntrack_proto_icmp.c | 10 |
3 files changed, 36 insertions, 33 deletions
diff --git a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c index a054fe083431..5c61328b7704 100644 --- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c +++ b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c @@ -56,11 +56,11 @@ static bool ipv4_invert_tuple(struct nf_conntrack_tuple *tuple, return true; } -static int ipv4_print_tuple(struct seq_file *s, +static void ipv4_print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple) { - return seq_printf(s, "src=%pI4 dst=%pI4 ", - &tuple->src.u3.ip, &tuple->dst.u3.ip); + seq_printf(s, "src=%pI4 dst=%pI4 ", + &tuple->src.u3.ip, &tuple->dst.u3.ip); } static int ipv4_get_l4proto(const struct sk_buff *skb, unsigned int nhoff, diff --git a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c index 4c48e434bb1f..a460a87e14f8 100644 --- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c +++ b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c @@ -94,7 +94,7 @@ static void ct_seq_stop(struct seq_file *s, void *v) } #ifdef CONFIG_NF_CONNTRACK_SECMARK -static int ct_show_secctx(struct seq_file *s, const struct nf_conn *ct) +static void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct) { int ret; u32 len; @@ -102,17 +102,15 @@ static int ct_show_secctx(struct seq_file *s, const struct nf_conn *ct) ret = security_secid_to_secctx(ct->secmark, &secctx, &len); if (ret) - return 0; + return; - ret = seq_printf(s, "secctx=%s ", secctx); + seq_printf(s, "secctx=%s ", secctx); security_release_secctx(secctx, len); - return ret; } #else -static inline int ct_show_secctx(struct seq_file *s, const struct nf_conn *ct) +static inline void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct) { - return 0; } #endif @@ -141,47 +139,52 @@ static int ct_seq_show(struct seq_file *s, void *v) NF_CT_ASSERT(l4proto); ret = -ENOSPC; - if (seq_printf(s, "%-8s %u %ld ", - l4proto->name, nf_ct_protonum(ct), - timer_pending(&ct->timeout) - ? (long)(ct->timeout.expires - jiffies)/HZ : 0) != 0) - goto release; + seq_printf(s, "%-8s %u %ld ", + l4proto->name, nf_ct_protonum(ct), + timer_pending(&ct->timeout) + ? (long)(ct->timeout.expires - jiffies)/HZ : 0); + + if (l4proto->print_conntrack) + l4proto->print_conntrack(s, ct); - if (l4proto->print_conntrack && l4proto->print_conntrack(s, ct)) + if (seq_has_overflowed(s)) goto release; - if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple, - l3proto, l4proto)) + print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple, + l3proto, l4proto); + + if (seq_has_overflowed(s)) goto release; if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL)) goto release; if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status))) - if (seq_printf(s, "[UNREPLIED] ")) - goto release; + seq_printf(s, "[UNREPLIED] "); - if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, - l3proto, l4proto)) + print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, + l3proto, l4proto); + + if (seq_has_overflowed(s)) goto release; if (seq_print_acct(s, ct, IP_CT_DIR_REPLY)) goto release; if (test_bit(IPS_ASSURED_BIT, &ct->status)) - if (seq_printf(s, "[ASSURED] ")) - goto release; + seq_printf(s, "[ASSURED] "); #ifdef CONFIG_NF_CONNTRACK_MARK - if (seq_printf(s, "mark=%u ", ct->mark)) - goto release; + seq_printf(s, "mark=%u ", ct->mark); #endif - if (ct_show_secctx(s, ct)) - goto release; + ct_show_secctx(s, ct); - if (seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use))) + seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use)); + + if (seq_has_overflowed(s)) goto release; + ret = 0; release: nf_ct_put(ct); diff --git a/net/ipv4/netfilter/nf_conntrack_proto_icmp.c b/net/ipv4/netfilter/nf_conntrack_proto_icmp.c index b91b2641adda..80d5554b9a88 100644 --- a/net/ipv4/netfilter/nf_conntrack_proto_icmp.c +++ b/net/ipv4/netfilter/nf_conntrack_proto_icmp.c @@ -72,13 +72,13 @@ static bool icmp_invert_tuple(struct nf_conntrack_tuple *tuple, } /* Print out the per-protocol part of the tuple. */ -static int icmp_print_tuple(struct seq_file *s, +static void icmp_print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple) { - return seq_printf(s, "type=%u code=%u id=%u ", - tuple->dst.u.icmp.type, - tuple->dst.u.icmp.code, - ntohs(tuple->src.u.icmp.id)); + seq_printf(s, "type=%u code=%u id=%u ", + tuple->dst.u.icmp.type, + tuple->dst.u.icmp.code, + ntohs(tuple->src.u.icmp.id)); } static unsigned int *icmp_get_timeouts(struct net *net) |