Re: /proc/net/* read drops data

15 messages, 3 authors, 2003-09-11 · open the first message on its own page

Re: /proc/net/* read drops data

From: YOSHIFUJI Hideaki / 吉藤英明 <hidden>
Date: 2003-09-03 07:07:25 

Hello.

In article [off-list ref] (at Wed, 27 Aug 2003 19:58:17 -0400 (EDT)), Ricky Beam [off-list ref] says:

On Wed, 27 Aug 2003, Ricky Beam wrote:
quoted
This smells like a simple "off by one" bug, but I've been too busy to go
look at the code.
Ah hah!  it's a block size problem... netstat reads 1024 at a time.

Using dd...

[root:pts/5{9}]gir:~/[7:55pm]:dd if=/proc/net/udp bs=1024 | wc
2+1 records in
2+1 records out
     18     216    2304
[root:pts/5{9}]gir:~/[7:56pm]:dd if=/proc/net/udp bs=2048 | wc
1+1 records in
1+1 records out
     19     228    2432
:

Please try this patch.

D: Fixing a bug that reading /proc/net/{udp,udp6} may drop some data

Index: linux-2.6/net/ipv4/udp.c
===================================================================
RCS file: /home/cvs/linux-2.5/net/ipv4/udp.c,v
retrieving revision 1.38
diff -u -r1.38 udp.c
--- linux-2.6/net/ipv4/udp.c	14 Aug 2003 06:00:04 -0000	1.38
+++ linux-2.6/net/ipv4/udp.c	3 Sep 2003 05:30:52 -0000
@@ -1349,64 +1349,65 @@
 /* ------------------------------------------------------------------------ */
 #ifdef CONFIG_PROC_FS
 
-static __inline__ struct sock *udp_get_bucket(struct seq_file *seq, loff_t *pos)
+static struct sock *udp_get_first(struct seq_file *seq)
 {
-	int i;
 	struct sock *sk;
-	struct hlist_node *node;
-	loff_t l = *pos;
 	struct udp_iter_state *state = seq->private;
 
-	for (; state->bucket < UDP_HTABLE_SIZE; ++state->bucket) {
-		i = 0;
+	for (state->bucket = 0; state->bucket < UDP_HTABLE_SIZE; ++state->bucket) {
+		struct hlist_node *node;
 		sk_for_each(sk, node, &udp_hash[state->bucket]) {
-			if (sk->sk_family != state->family) {
-				++i;
-				continue;
-			}
-			if (l--) {
-				++i;
-				continue;
-			}
-			*pos = i;
-			goto out;
+			if (sk->sk_family == state->family)
+				goto found;
 		}
 	}
 	sk = NULL;
-out:
+found:
 	return sk;
 }
 
+static struct sock *udp_get_next(struct seq_file *seq, struct sock *sk)
+{
+	struct udp_iter_state *state = seq->private;
+
+	do {
+		sk = sk_next(sk);
+try_again:
+		;
+	} while (sk && sk->sk_family != state->family);
+
+	if (!sk && ++state->bucket < UDP_HTABLE_SIZE) {
+		sk = sk_head(&udp_hash[state->bucket]);
+		goto try_again;
+	}
+	return sk;
+}
+
+static struct sock *udp_get_idx(struct seq_file *seq, loff_t pos)
+{
+	struct sock *sk = udp_get_first(seq);
+
+	if (sk)
+		while(pos && (sk = udp_get_next(seq, sk)) != NULL)
+			--pos;
+	return pos ? NULL : sk;
+}
+
 static void *udp_seq_start(struct seq_file *seq, loff_t *pos)
 {
 	read_lock(&udp_hash_lock);
-	return *pos ? udp_get_bucket(seq, pos) : (void *)1;
+	return *pos ? udp_get_idx(seq, *pos-1) : (void *)1;
 }
 
 static void *udp_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 {
 	struct sock *sk;
-	struct hlist_node *node;
-	struct udp_iter_state *state;
-
-	if (v == (void *)1) {
-		sk = udp_get_bucket(seq, pos);
-		goto out;
-	}
 
-	state = seq->private;
+	if (v == (void *)1)
+		sk = udp_get_idx(seq, 0);
+	else
+		sk = udp_get_next(seq, v);
 
-	sk = v;
-	sk_for_each_continue(sk, node)
-		if (sk->sk_family == state->family)
-			goto out;
-
-	if (++state->bucket >= UDP_HTABLE_SIZE) 
-		goto out;
-
-	*pos = 0;
-	sk = udp_get_bucket(seq, pos);
-out:
 	++*pos;
 	return sk;
 }

-- 
Hideaki YOSHIFUJI @ USAGI Project <yoshfuji@linux-ipv6.org>
GPG FP: 9022 65EB 1ECF 3AD1 0BDF  80D8 4807 F894 E062 0EEA

Re: /proc/net/* read drops data

From: David S. Miller <hidden>
Date: 2003-09-04 07:56:18 

On Wed, 03 Sep 2003 16:07:33 +0900 (JST)
YOSHIFUJI Hideaki / _$B5HF#1QL@ [off-list ref] wrote:

D: Fixing a bug that reading /proc/net/{udp,udp6} may drop some data
This fix looks good to me.  Applied.

Re: /proc/net/* read drops data

From: Ricky Beam <hidden>
Date: 2003-09-04 16:26:18 

On Thu, 4 Sep 2003, David S. Miller wrote:
quoted
D: Fixing a bug that reading /proc/net/{udp,udp6} may drop some data
This fix looks good to me.  Applied.
That might fix udp, but that's not the only one to be fixed.  I'll compile
a list. (tcp for sure.)

--Ricky

Re: /proc/net/* read drops data

From: Ricky Beam <hidden>
Date: 2003-09-04 16:28:53 

On Thu, 4 Sep 2003, David S. Miller wrote:
quoted
D: Fixing a bug that reading /proc/net/{udp,udp6} may drop some data
This fix looks good to me.  Applied.
The list:
(file)			(bs=1)	(bs=10000)
/proc/net/igmp		122     191
/proc/net/route		128     384
/proc/net/rt_acct	0	4096
/proc/net/rt_cache	384     512
/proc/net/tcp		1800    1950
/proc/net/udp		1024    1152

(I don't have ipv6 enabled)

--Ricky

Re: /proc/net/* read drops data

From: YOSHIFUJI Hideaki / 吉藤英明 <hidden>
Date: 2003-09-04 17:12:40 

In article [off-list ref] (at Thu, 4 Sep 2003 12:25:16 -0400 (EDT)), Ricky Beam [off-list ref] says:

The list:
(file)			(bs=1)	(bs=10000)
/proc/net/igmp		122     191
/proc/net/route		128     384
/proc/net/rt_acct	0	4096
/proc/net/rt_cache	384     512
/proc/net/tcp		1800    1950
/proc/net/udp		1024    1152
Okay, I'll seek the code.
--yoshfuji

Re: /proc/net/* read drops data

From: YOSHIFUJI Hideaki / 吉藤英明 <hidden>
Date: 2003-09-06 07:04:58 

In article [off-list ref] (at Thu, 4 Sep 2003 12:25:16 -0400 (EDT)), Ricky Beam [off-list ref] says:
quoted
This fix looks good to me.  Applied.
The list:
(file)			(bs=1)	(bs=10000)
/proc/net/igmp		122     191
/proc/net/route		128     384
/proc/net/rt_acct	0	4096
/proc/net/rt_cache	384     512
/proc/net/tcp		1800    1950
/proc/net/udp		1024    1152
Well, I'm about to post 3 patches.

[1/3] /proc/net/{igmp,msfilter,raw,rt_cache,ip6_flowlabel,msfilter6,raw6} may drop some data
[2/3] /proc/net/if_inet6 may drop some data
[3/3] clean up /proc/net/{anycast6,igmp6}

Note 0: These confilct with SEQ_START_TOKEN patches; 
        I'll regenerate if SEQ_START_TOKEN accepted.
Note 1: /proc/net/rt_acct does not use seq_file
Note 2: /proc/net/{route,tcp,tcp6} is not fixed by these

-- 
Hideaki YOSHIFUJI @ USAGI Project [off-list ref]
GPG FP: 9022 65EB 1ECF 3AD1 0BDF  80D8 4807 F894 E062 0EEA

[PATCH 1/3] /proc/net/{igmp,msfilter,raw,rt_cache,ip6_flowlabel,msfilter6,raw6} may drop some data (Re: /proc/net/* read drops data)

From: YOSHIFUJI Hideaki / 吉藤英明 <hidden>
Date: 2003-09-06 07:10:44 

[1/3] /proc/net/{igmp,msfilter,raw,rt_cache,ip6_flowlabel,msfilter6,raw6} may drop some data

Index: linux-2.6/net/ipv4/igmp.c
===================================================================
RCS file: /home/cvs/linux-2.5/net/ipv4/igmp.c,v
retrieving revision 1.34
diff -u -r1.34 igmp.c
--- linux-2.6/net/ipv4/igmp.c	1 Sep 2003 05:52:50 -0000	1.34
+++ linux-2.6/net/ipv4/igmp.c	6 Sep 2003 04:23:07 -0000
@@ -2162,7 +2162,7 @@
 static void *igmp_mc_seq_start(struct seq_file *seq, loff_t *pos)
 {
 	read_lock(&dev_base_lock);
-	return *pos ? igmp_mc_get_idx(seq, *pos) : (void *)1;
+	return *pos ? igmp_mc_get_idx(seq, *pos - 1) : (void *)1;
 }
 
 static void *igmp_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
@@ -2337,7 +2337,7 @@
 static void *igmp_mcf_seq_start(struct seq_file *seq, loff_t *pos)
 {
 	read_lock(&dev_base_lock);
-	return *pos ? igmp_mcf_get_idx(seq, *pos) : (void *)1;
+	return *pos ? igmp_mcf_get_idx(seq, *pos - 1) : (void *)1;
 }
 
 static void *igmp_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos)
Index: linux-2.6/net/ipv4/raw.c
===================================================================
RCS file: /home/cvs/linux-2.5/net/ipv4/raw.c,v
retrieving revision 1.35
diff -u -r1.35 raw.c
--- linux-2.6/net/ipv4/raw.c	11 Jul 2003 04:06:16 -0000	1.35
+++ linux-2.6/net/ipv4/raw.c	6 Sep 2003 04:23:07 -0000
@@ -736,7 +736,7 @@
 static void *raw_seq_start(struct seq_file *seq, loff_t *pos)
 {
 	read_lock(&raw_v4_lock);
-	return *pos ? raw_get_idx(seq, *pos) : (void *)1;
+	return *pos ? raw_get_idx(seq, *pos - 1) : (void *)1;
 }
 
 static void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos)
Index: linux-2.6/net/ipv4/route.c
===================================================================
RCS file: /home/cvs/linux-2.5/net/ipv4/route.c,v
retrieving revision 1.58
diff -u -r1.58 route.c
--- linux-2.6/net/ipv4/route.c	1 Sep 2003 05:52:50 -0000	1.58
+++ linux-2.6/net/ipv4/route.c	6 Sep 2003 04:23:07 -0000
@@ -259,7 +259,7 @@
 
 static void *rt_cache_seq_start(struct seq_file *seq, loff_t *pos)
 {
-	return *pos ? rt_cache_get_idx(seq, *pos) : (void *)1;
+	return *pos ? rt_cache_get_idx(seq, *pos - 1) : (void *)1;
 }
 
 static void *rt_cache_seq_next(struct seq_file *seq, void *v, loff_t *pos)
Index: linux-2.6/net/ipv6/ip6_flowlabel.c
===================================================================
RCS file: /home/cvs/linux-2.5/net/ipv6/ip6_flowlabel.c,v
retrieving revision 1.8
diff -u -r1.8 ip6_flowlabel.c
--- linux-2.6/net/ipv6/ip6_flowlabel.c	2 Sep 2003 14:48:07 -0000	1.8
+++ linux-2.6/net/ipv6/ip6_flowlabel.c	6 Sep 2003 04:23:07 -0000
@@ -603,7 +603,7 @@
 static void *ip6fl_seq_start(struct seq_file *seq, loff_t *pos)
 {
 	read_lock_bh(&ip6_fl_lock);
-	return *pos ? ip6fl_get_idx(seq, *pos) : (void *)1;
+	return *pos ? ip6fl_get_idx(seq, *pos - 1) : (void *)1;
 }
 
 static void *ip6fl_seq_next(struct seq_file *seq, void *v, loff_t *pos)
Index: linux-2.6/net/ipv6/mcast.c
===================================================================
RCS file: /home/cvs/linux-2.5/net/ipv6/mcast.c,v
retrieving revision 1.31
diff -u -r1.31 mcast.c
--- linux-2.6/net/ipv6/mcast.c	1 Sep 2003 05:52:50 -0000	1.31
+++ linux-2.6/net/ipv6/mcast.c	6 Sep 2003 04:23:07 -0000
@@ -2278,7 +2278,7 @@
 static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos)
 {
 	read_lock(&dev_base_lock);
-	return *pos ? igmp6_mcf_get_idx(seq, *pos) : (void *)1;
+	return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : (void *)1;
 }
 
 static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos)
Index: linux-2.6/net/ipv6/raw.c
===================================================================
RCS file: /home/cvs/linux-2.5/net/ipv6/raw.c,v
retrieving revision 1.37
diff -u -r1.37 raw.c
--- linux-2.6/net/ipv6/raw.c	18 Aug 2003 10:14:52 -0000	1.37
+++ linux-2.6/net/ipv6/raw.c	6 Sep 2003 04:23:07 -0000
@@ -961,7 +961,7 @@
 static void *raw6_seq_start(struct seq_file *seq, loff_t *pos)
 {
 	read_lock(&raw_v6_lock);
-	return *pos ? raw6_get_idx(seq, *pos) : (void *)1;
+	return *pos ? raw6_get_idx(seq, *pos - 1) : (void *)1;
 }
 
 static void *raw6_seq_next(struct seq_file *seq, void *v, loff_t *pos)

-- 
Hideaki YOSHIFUJI @ USAGI Project <yoshfuji@linux-ipv6.org>
GPG FP: 9022 65EB 1ECF 3AD1 0BDF  80D8 4807 F894 E062 0EEA

[PATCH 2/3] /proc/net/if_inet6 may drop some data (Re: /proc/net/* read drops data)

From: YOSHIFUJI Hideaki / 吉藤英明 <hidden>
Date: 2003-09-06 07:10:48 

[2/3] /proc/net/if_inet6 may drop some data

Index: linux-2.6/net/ipv6/addrconf.c
===================================================================
RCS file: /home/cvs/linux-2.5/net/ipv6/addrconf.c,v
retrieving revision 1.52
diff -u -r1.52 addrconf.c
--- linux-2.6/net/ipv6/addrconf.c	4 Sep 2003 15:47:07 -0000	1.52
+++ linux-2.6/net/ipv6/addrconf.c	6 Sep 2003 04:23:07 -0000
@@ -2149,59 +2149,65 @@
 	int bucket;
 };
 
-static inline struct inet6_ifaddr *if6_get_bucket(struct seq_file *seq, loff_t *pos)
+static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
 {
-	int i;
 	struct inet6_ifaddr *ifa = NULL;
-	loff_t l = *pos;
 	struct if6_iter_state *state = seq->private;
 
-	for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket)
-		for (i = 0, ifa = inet6_addr_lst[state->bucket]; ifa; ++i, ifa=ifa->lst_next) {
-			if (l--)
-				continue;
-			*pos = i;
-			goto out;
-		}
-out:
+	for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
+		ifa = inet6_addr_lst[state->bucket];
+		if (ifa)
+			break;
+	}
+	return ifa;
+}
+
+static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
+{
+	struct if6_iter_state *state = seq->private;
+
+	ifa = ifa->lst_next;
+try_again:
+	if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
+		ifa = inet6_addr_lst[state->bucket];
+		goto try_again;
+	}
 	return ifa;
 }
 
+static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
+{
+	struct inet6_ifaddr *ifa = if6_get_first(seq);
+
+	if (ifa)
+		while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
+			--pos;
+	return pos ? NULL : ifa;
+}
+
 static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
 {
 	read_lock_bh(&addrconf_hash_lock);
-	return *pos ? if6_get_bucket(seq, pos) : (void *)1;
+	return if6_get_idx(seq, *pos);
 }
 
 static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 {
 	struct inet6_ifaddr *ifa;
-	struct if6_iter_state *state;
-
-	if (v == (void *)1) {
-		ifa = if6_get_bucket(seq, pos);
-		goto out;
-	}
-
-	state = seq->private;
-
-	ifa = v;
-	ifa = ifa->lst_next;
-	if (ifa)
-		goto out;
-
-	if (++state->bucket >= IN6_ADDR_HSIZE)
-		goto out;
 
-	*pos = 0;
-	ifa = if6_get_bucket(seq, pos);
-out:
+	ifa = if6_get_next(seq, v);
 	++*pos;
 	return ifa;
 }
 
-static inline void if6_iface_seq_show(struct seq_file *seq, struct inet6_ifaddr *ifp)
+static void if6_seq_stop(struct seq_file *seq, void *v)
+{
+	read_unlock_bh(&addrconf_hash_lock);
+}
+
+static int if6_seq_show(struct seq_file *seq, void *v)
 {
+	struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
 	seq_printf(seq,
 		   "%04x%04x%04x%04x%04x%04x%04x%04x %02x %02x %02x %02x %8s\n",
 		   NIP6(ifp->addr),
@@ -2210,20 +2216,7 @@
 		   ifp->scope,
 		   ifp->flags,
 		   ifp->idev->dev->name);
-}
-
-static int if6_seq_show(struct seq_file *seq, void *v)
-{
-	if (v == (void *)1)
-		return 0;
-	else
-		if6_iface_seq_show(seq, v);
 	return 0;
-}
-
-static void if6_seq_stop(struct seq_file *seq, void *v)
-{
-	read_unlock_bh(&addrconf_hash_lock);
 }
 
 static struct seq_operations if6_seq_ops = {

-- 
Hideaki YOSHIFUJI @ USAGI Project <yoshfuji@linux-ipv6.org>
GPG FP: 9022 65EB 1ECF 3AD1 0BDF  80D8 4807 F894 E062 0EEA

[PATCH 3/3] clean up /proc/net/{anycast6,igmp6} (Re: /proc/net/* read drops data)

From: YOSHIFUJI Hideaki / 吉藤英明 <hidden>
Date: 2003-09-06 07:10:53 

[3/3] clean up /proc/net/{anycast6,igmp6}

Index: linux-2.6/net/ipv6/anycast.c
===================================================================
RCS file: /home/cvs/linux-2.5/net/ipv6/anycast.c,v
retrieving revision 1.7
diff -u -r1.7 anycast.c
--- linux-2.6/net/ipv6/anycast.c	25 Jul 2003 17:11:54 -0000	1.7
+++ linux-2.6/net/ipv6/anycast.c	6 Sep 2003 04:23:07 -0000
@@ -505,7 +505,7 @@
 static void *ac6_seq_start(struct seq_file *seq, loff_t *pos)
 {
 	read_lock(&dev_base_lock);
-	return *pos ? ac6_get_idx(seq, *pos) : ac6_get_first(seq);
+	return ac6_get_idx(seq, *pos);
 }
 
 static void *ac6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
Index: linux-2.6/net/ipv6/mcast.c
===================================================================
RCS file: /home/cvs/linux-2.5/net/ipv6/mcast.c,v
retrieving revision 1.31
diff -u -r1.31 mcast.c
--- linux-2.6/net/ipv6/mcast.c	1 Sep 2003 05:52:50 -0000	1.31
+++ linux-2.6/net/ipv6/mcast.c	6 Sep 2003 04:23:07 -0000
@@ -2119,7 +2119,7 @@
 static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos)
 {
 	read_lock(&dev_base_lock);
-	return *pos ? igmp6_mc_get_idx(seq, *pos) : igmp6_mc_get_first(seq);
+	return igmp6_mc_get_idx(seq, *pos);
 }
 
 static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)

-- 
Hideaki YOSHIFUJI @ USAGI Project <yoshfuji@linux-ipv6.org>
GPG FP: 9022 65EB 1ECF 3AD1 0BDF  80D8 4807 F894 E062 0EEA

[RESEND 1/3] /proc/net/{igmp,msfilter,raw,rt_cache,ip6_flowlabel,msfilter6,raw6} may drop some data

From: YOSHIFUJI Hideaki / 吉藤英明 <hidden>
Date: 2003-09-10 02:53:49 

Hello.

In article [off-list ref] (at Sat, 06 Sep 2003 16:04:58 +0900 (JST)), YOSHIFUJI Hideaki / 吉藤英明 [off-list ref] says:

[1/3] /proc/net/{igmp,msfilter,raw,rt_cache,ip6_flowlabel,msfilter6,raw6} may drop some data
:
Note 0: These confilct with SEQ_START_TOKEN patches; 
        I'll regenerate if SEQ_START_TOKEN accepted.
Index: linux-2.6/net/ipv4/igmp.c
===================================================================
RCS file: /home/cvs/linux-2.5/net/ipv4/igmp.c,v
retrieving revision 1.35
diff -u -r1.35 igmp.c
--- linux-2.6/net/ipv4/igmp.c	9 Sep 2003 23:24:51 -0000	1.35
+++ linux-2.6/net/ipv4/igmp.c	10 Sep 2003 01:00:49 -0000
@@ -2162,7 +2162,7 @@
 static void *igmp_mc_seq_start(struct seq_file *seq, loff_t *pos)
 {
 	read_lock(&dev_base_lock);
-	return *pos ? igmp_mc_get_idx(seq, *pos) : SEQ_START_TOKEN;
+	return *pos ? igmp_mc_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
 }
 
 static void *igmp_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
@@ -2337,7 +2337,7 @@
 static void *igmp_mcf_seq_start(struct seq_file *seq, loff_t *pos)
 {
 	read_lock(&dev_base_lock);
-	return *pos ? igmp_mcf_get_idx(seq, *pos) : SEQ_START_TOKEN;
+	return *pos ? igmp_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
 }
 
 static void *igmp_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos)
Index: linux-2.6/net/ipv4/raw.c
===================================================================
RCS file: /home/cvs/linux-2.5/net/ipv4/raw.c,v
retrieving revision 1.36
diff -u -r1.36 raw.c
--- linux-2.6/net/ipv4/raw.c	9 Sep 2003 23:24:51 -0000	1.36
+++ linux-2.6/net/ipv4/raw.c	10 Sep 2003 01:00:49 -0000
@@ -736,7 +736,7 @@
 static void *raw_seq_start(struct seq_file *seq, loff_t *pos)
 {
 	read_lock(&raw_v4_lock);
-	return *pos ? raw_get_idx(seq, *pos) : SEQ_START_TOKEN;
+	return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
 }
 
 static void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos)
Index: linux-2.6/net/ipv4/route.c
===================================================================
RCS file: /home/cvs/linux-2.5/net/ipv4/route.c,v
retrieving revision 1.59
diff -u -r1.59 route.c
--- linux-2.6/net/ipv4/route.c	9 Sep 2003 23:24:51 -0000	1.59
+++ linux-2.6/net/ipv4/route.c	10 Sep 2003 01:00:49 -0000
@@ -259,7 +259,7 @@
 
 static void *rt_cache_seq_start(struct seq_file *seq, loff_t *pos)
 {
-	return *pos ? rt_cache_get_idx(seq, *pos) : SEQ_START_TOKEN;
+	return *pos ? rt_cache_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
 }
 
 static void *rt_cache_seq_next(struct seq_file *seq, void *v, loff_t *pos)
Index: linux-2.6/net/ipv6/ip6_flowlabel.c
===================================================================
RCS file: /home/cvs/linux-2.5/net/ipv6/ip6_flowlabel.c,v
retrieving revision 1.9
diff -u -r1.9 ip6_flowlabel.c
--- linux-2.6/net/ipv6/ip6_flowlabel.c	9 Sep 2003 23:24:51 -0000	1.9
+++ linux-2.6/net/ipv6/ip6_flowlabel.c	10 Sep 2003 01:00:49 -0000
@@ -603,7 +603,7 @@
 static void *ip6fl_seq_start(struct seq_file *seq, loff_t *pos)
 {
 	read_lock_bh(&ip6_fl_lock);
-	return *pos ? ip6fl_get_idx(seq, *pos) : SEQ_START_TOKEN;
+	return *pos ? ip6fl_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
 }
 
 static void *ip6fl_seq_next(struct seq_file *seq, void *v, loff_t *pos)
Index: linux-2.6/net/ipv6/mcast.c
===================================================================
RCS file: /home/cvs/linux-2.5/net/ipv6/mcast.c,v
retrieving revision 1.32
diff -u -r1.32 mcast.c
--- linux-2.6/net/ipv6/mcast.c	9 Sep 2003 23:24:51 -0000	1.32
+++ linux-2.6/net/ipv6/mcast.c	10 Sep 2003 01:00:49 -0000
@@ -2278,7 +2278,7 @@
 static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos)
 {
 	read_lock(&dev_base_lock);
-	return *pos ? igmp6_mcf_get_idx(seq, *pos) : SEQ_START_TOKEN;
+	return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
 }
 
 static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos)
Index: linux-2.6/net/ipv6/raw.c
===================================================================
RCS file: /home/cvs/linux-2.5/net/ipv6/raw.c,v
retrieving revision 1.38
diff -u -r1.38 raw.c
--- linux-2.6/net/ipv6/raw.c	9 Sep 2003 23:24:51 -0000	1.38
+++ linux-2.6/net/ipv6/raw.c	10 Sep 2003 01:00:49 -0000
@@ -961,7 +961,7 @@
 static void *raw6_seq_start(struct seq_file *seq, loff_t *pos)
 {
 	read_lock(&raw_v6_lock);
-	return *pos ? raw6_get_idx(seq, *pos) : SEQ_START_TOKEN;
+	return *pos ? raw6_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
 }
 
 static void *raw6_seq_next(struct seq_file *seq, void *v, loff_t *pos)


-- 
Hideaki YOSHIFUJI @ USAGI Project <yoshfuji@linux-ipv6.org>
GPG FP: 9022 65EB 1ECF 3AD1 0BDF  80D8 4807 F894 E062 0EEA

[RESEND 2/3] /proc/net/if_inet6 may drop some data

From: YOSHIFUJI Hideaki / 吉藤英明 <hidden>
Date: 2003-09-10 02:53:53 

Hello.

In article [off-list ref] (at Sat, 06 Sep 2003 16:04:58 +0900 (JST)), YOSHIFUJI Hideaki / 吉藤英明 [off-list ref] says:

[2/3] /proc/net/if_inet6 may drop some data
:
Note 0: These confilct with SEQ_START_TOKEN patches; 
        I'll regenerate if SEQ_START_TOKEN accepted.
Index: linux-2.6/net/ipv6/addrconf.c
===================================================================
RCS file: /home/cvs/linux-2.5/net/ipv6/addrconf.c,v
retrieving revision 1.53
diff -u -r1.53 addrconf.c
--- linux-2.6/net/ipv6/addrconf.c	9 Sep 2003 23:24:51 -0000	1.53
+++ linux-2.6/net/ipv6/addrconf.c	10 Sep 2003 01:00:49 -0000
@@ -2149,59 +2149,65 @@
 	int bucket;
 };
 
-static inline struct inet6_ifaddr *if6_get_bucket(struct seq_file *seq, loff_t *pos)
+static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
 {
-	int i;
 	struct inet6_ifaddr *ifa = NULL;
-	loff_t l = *pos;
 	struct if6_iter_state *state = seq->private;
 
-	for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket)
-		for (i = 0, ifa = inet6_addr_lst[state->bucket]; ifa; ++i, ifa=ifa->lst_next) {
-			if (l--)
-				continue;
-			*pos = i;
-			goto out;
-		}
-out:
+	for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
+		ifa = inet6_addr_lst[state->bucket];
+		if (ifa)
+			break;
+	}
+	return ifa;
+}
+
+static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
+{
+	struct if6_iter_state *state = seq->private;
+
+	ifa = ifa->lst_next;
+try_again:
+	if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
+		ifa = inet6_addr_lst[state->bucket];
+		goto try_again;
+	}
 	return ifa;
 }
 
+static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
+{
+	struct inet6_ifaddr *ifa = if6_get_first(seq);
+
+	if (ifa)
+		while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
+			--pos;
+	return pos ? NULL : ifa;
+}
+
 static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
 {
 	read_lock_bh(&addrconf_hash_lock);
-	return *pos ? if6_get_bucket(seq, pos) : SEQ_START_TOKEN;
+	return if6_get_idx(seq, *pos);
 }
 
 static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 {
 	struct inet6_ifaddr *ifa;
-	struct if6_iter_state *state;
-
-	if (v == SEQ_START_TOKEN) {
-		ifa = if6_get_bucket(seq, pos);
-		goto out;
-	}
-
-	state = seq->private;
-
-	ifa = v;
-	ifa = ifa->lst_next;
-	if (ifa)
-		goto out;
-
-	if (++state->bucket >= IN6_ADDR_HSIZE)
-		goto out;
 
-	*pos = 0;
-	ifa = if6_get_bucket(seq, pos);
-out:
+	ifa = if6_get_next(seq, v);
 	++*pos;
 	return ifa;
 }
 
-static inline void if6_iface_seq_show(struct seq_file *seq, struct inet6_ifaddr *ifp)
+static void if6_seq_stop(struct seq_file *seq, void *v)
+{
+	read_unlock_bh(&addrconf_hash_lock);
+}
+
+static int if6_seq_show(struct seq_file *seq, void *v)
 {
+	struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
 	seq_printf(seq,
 		   "%04x%04x%04x%04x%04x%04x%04x%04x %02x %02x %02x %02x %8s\n",
 		   NIP6(ifp->addr),
@@ -2210,20 +2216,7 @@
 		   ifp->scope,
 		   ifp->flags,
 		   ifp->idev->dev->name);
-}
-
-static int if6_seq_show(struct seq_file *seq, void *v)
-{
-	if (v == SEQ_START_TOKEN)
-		return 0;
-	else
-		if6_iface_seq_show(seq, v);
 	return 0;
-}
-
-static void if6_seq_stop(struct seq_file *seq, void *v)
-{
-	read_unlock_bh(&addrconf_hash_lock);
 }
 
 static struct seq_operations if6_seq_ops = {


-- 
Hideaki YOSHIFUJI @ USAGI Project <yoshfuji@linux-ipv6.org>
GPG FP: 9022 65EB 1ECF 3AD1 0BDF  80D8 4807 F894 E062 0EEA

[RESEND 3/3] clean up /proc/net/{anycast6,igmp6}

From: YOSHIFUJI Hideaki / 吉藤英明 <hidden>
Date: 2003-09-10 02:53:56 

Hello.

In article [off-list ref] (at Sat, 06 Sep 2003 16:04:58 +0900 (JST)), YOSHIFUJI Hideaki / 吉藤英明 [off-list ref] says:

In article [off-list ref] (at Thu, 4 Sep 2003 12:25:16 -0400 (EDT))
[3/3] clean up /proc/net/{anycast6,igmp6}
:
Note 0: These confilct with SEQ_START_TOKEN patches; 
        I'll regenerate if SEQ_START_TOKEN accepted.
Index: linux-2.6/net/ipv6/anycast.c
===================================================================
RCS file: /home/cvs/linux-2.5/net/ipv6/anycast.c,v
retrieving revision 1.7
diff -u -r1.7 anycast.c
--- linux-2.6/net/ipv6/anycast.c	25 Jul 2003 17:11:54 -0000	1.7
+++ linux-2.6/net/ipv6/anycast.c	10 Sep 2003 01:00:49 -0000
@@ -505,7 +505,7 @@
 static void *ac6_seq_start(struct seq_file *seq, loff_t *pos)
 {
 	read_lock(&dev_base_lock);
-	return *pos ? ac6_get_idx(seq, *pos) : ac6_get_first(seq);
+	return ac6_get_idx(seq, *pos);
 }
 
 static void *ac6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
Index: linux-2.6/net/ipv6/mcast.c
===================================================================
RCS file: /home/cvs/linux-2.5/net/ipv6/mcast.c,v
retrieving revision 1.32
diff -u -r1.32 mcast.c
--- linux-2.6/net/ipv6/mcast.c	9 Sep 2003 23:24:51 -0000	1.32
+++ linux-2.6/net/ipv6/mcast.c	10 Sep 2003 01:00:49 -0000
@@ -2119,7 +2119,7 @@
 static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos)
 {
 	read_lock(&dev_base_lock);
-	return *pos ? igmp6_mc_get_idx(seq, *pos) : igmp6_mc_get_first(seq);
+	return igmp6_mc_get_idx(seq, *pos);
 }
 
 static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)


-- 
Hideaki YOSHIFUJI @ USAGI Project <yoshfuji@linux-ipv6.org>
GPG FP: 9022 65EB 1ECF 3AD1 0BDF  80D8 4807 F894 E062 0EEA

Re: [RESEND 1/3] /proc/net/{igmp,msfilter,raw,rt_cache,ip6_flowlabel,msfilter6,raw6} may drop some data

From: David S. Miller <hidden>
Date: 2003-09-11 23:31:20 

Applied, thank you Yoshfuji.

Re: [RESEND 2/3] /proc/net/if_inet6 may drop some data

From: David S. Miller <hidden>
Date: 2003-09-11 23:33:29 

Applied, thanks.

Re: [RESEND 3/3] clean up /proc/net/{anycast6,igmp6}

From: David S. Miller <hidden>
Date: 2003-09-11 23:34:27 

Applied, thanks.
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