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From: Christoph Hellwig <hch@lst.de>
To: Andrew Morton <akpm@linux-foundation.org>,
	Alexander Viro <viro@zeniv.linux.org.uk>
Cc: linux-rtc@vger.kernel.org,
	Alessandro Zummo <a.zummo@towertech.it>,
	Alexandre Belloni <alexandre.belloni@bootlin.com>,
	devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org,
	linux-scsi@vger.kernel.org, linux-ide@vger.kernel.org,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	jfs-discussion@lists.sourceforge.net,
	linux-afs@lists.infradead.org, linux-acpi@vger.kernel.org,
	netdev@vger.kernel.org, netfilter-devel@vger.kernel.org,
	Jiri Slaby <jslaby@suse.com>,
	linux-ext4@vger.kernel.org, Alexey Dobriyan <adobriyan@gmail.com>,
	megaraidlinux.pdl@broadcom.com, drbd-dev@lists.linbit.com
Subject: [PATCH 07/40] ipv{4,6}/udp{,lite}: simplify proc registration
Date: Wed, 25 Apr 2018 17:47:54 +0200	[thread overview]
Message-ID: <20180425154827.32251-8-hch@lst.de> (raw)
In-Reply-To: <20180425154827.32251-1-hch@lst.de>

Remove a couple indirections to make the code look like most other
protocols.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 include/net/udp.h  | 20 ++++------
 net/ipv4/udp.c     | 99 +++++++++++++++++-----------------------------
 net/ipv4/udplite.c | 21 +++-------
 net/ipv6/udp.c     | 30 +++++++++-----
 net/ipv6/udplite.c | 21 +++-------
 5 files changed, 78 insertions(+), 113 deletions(-)

diff --git a/include/net/udp.h b/include/net/udp.h
index 0676b272f6ac..093cd323f66a 100644
--- a/include/net/udp.h
+++ b/include/net/udp.h
@@ -408,31 +408,27 @@ do {									\
 #define __UDPX_INC_STATS(sk, field) __UDP_INC_STATS(sock_net(sk), field, 0)
 #endif
 
-/* /proc */
-int udp_seq_open(struct inode *inode, struct file *file);
-
+#ifdef CONFIG_PROC_FS
 struct udp_seq_afinfo {
-	char				*name;
 	sa_family_t			family;
 	struct udp_table		*udp_table;
-	const struct file_operations	*seq_fops;
-	struct seq_operations		seq_ops;
 };
 
 struct udp_iter_state {
 	struct seq_net_private  p;
-	sa_family_t		family;
 	int			bucket;
-	struct udp_table	*udp_table;
 };
 
-#ifdef CONFIG_PROC_FS
-int udp_proc_register(struct net *net, struct udp_seq_afinfo *afinfo);
-void udp_proc_unregister(struct net *net, struct udp_seq_afinfo *afinfo);
+void *udp_seq_start(struct seq_file *seq, loff_t *pos);
+void *udp_seq_next(struct seq_file *seq, void *v, loff_t *pos);
+void udp_seq_stop(struct seq_file *seq, void *v);
+
+extern const struct file_operations udp_afinfo_seq_fops;
+extern const struct file_operations udp6_afinfo_seq_fops;
 
 int udp4_proc_init(void);
 void udp4_proc_exit(void);
-#endif
+#endif /* CONFIG_PROC_FS */
 
 int udpv4_offload_init(void);
 
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 24b5c59b1c53..d48790ddb6cf 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -2579,12 +2579,13 @@ EXPORT_SYMBOL(udp_prot);
 static struct sock *udp_get_first(struct seq_file *seq, int start)
 {
 	struct sock *sk;
+	struct udp_seq_afinfo *afinfo = PDE_DATA(file_inode(seq->file));
 	struct udp_iter_state *state = seq->private;
 	struct net *net = seq_file_net(seq);
 
-	for (state->bucket = start; state->bucket <= state->udp_table->mask;
+	for (state->bucket = start; state->bucket <= afinfo->udp_table->mask;
 	     ++state->bucket) {
-		struct udp_hslot *hslot = &state->udp_table->hash[state->bucket];
+		struct udp_hslot *hslot = &afinfo->udp_table->hash[state->bucket];
 
 		if (hlist_empty(&hslot->head))
 			continue;
@@ -2593,7 +2594,7 @@ static struct sock *udp_get_first(struct seq_file *seq, int start)
 		sk_for_each(sk, &hslot->head) {
 			if (!net_eq(sock_net(sk), net))
 				continue;
-			if (sk->sk_family == state->family)
+			if (sk->sk_family == afinfo->family)
 				goto found;
 		}
 		spin_unlock_bh(&hslot->lock);
@@ -2605,16 +2606,17 @@ static struct sock *udp_get_first(struct seq_file *seq, int start)
 
 static struct sock *udp_get_next(struct seq_file *seq, struct sock *sk)
 {
+	struct udp_seq_afinfo *afinfo = PDE_DATA(file_inode(seq->file));
 	struct udp_iter_state *state = seq->private;
 	struct net *net = seq_file_net(seq);
 
 	do {
 		sk = sk_next(sk);
-	} while (sk && (!net_eq(sock_net(sk), net) || sk->sk_family != state->family));
+	} while (sk && (!net_eq(sock_net(sk), net) || sk->sk_family != afinfo->family));
 
 	if (!sk) {
-		if (state->bucket <= state->udp_table->mask)
-			spin_unlock_bh(&state->udp_table->hash[state->bucket].lock);
+		if (state->bucket <= afinfo->udp_table->mask)
+			spin_unlock_bh(&afinfo->udp_table->hash[state->bucket].lock);
 		return udp_get_first(seq, state->bucket + 1);
 	}
 	return sk;
@@ -2630,15 +2632,16 @@ static struct sock *udp_get_idx(struct seq_file *seq, loff_t pos)
 	return pos ? NULL : sk;
 }
 
-static void *udp_seq_start(struct seq_file *seq, loff_t *pos)
+void *udp_seq_start(struct seq_file *seq, loff_t *pos)
 {
 	struct udp_iter_state *state = seq->private;
 	state->bucket = MAX_UDP_PORTS;
 
 	return *pos ? udp_get_idx(seq, *pos-1) : SEQ_START_TOKEN;
 }
+EXPORT_SYMBOL(udp_seq_start);
 
-static void *udp_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+void *udp_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 {
 	struct sock *sk;
 
@@ -2650,56 +2653,17 @@ static void *udp_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 	++*pos;
 	return sk;
 }
+EXPORT_SYMBOL(udp_seq_next);
 
-static void udp_seq_stop(struct seq_file *seq, void *v)
+void udp_seq_stop(struct seq_file *seq, void *v)
 {
+	struct udp_seq_afinfo *afinfo = PDE_DATA(file_inode(seq->file));
 	struct udp_iter_state *state = seq->private;
 
-	if (state->bucket <= state->udp_table->mask)
-		spin_unlock_bh(&state->udp_table->hash[state->bucket].lock);
+	if (state->bucket <= afinfo->udp_table->mask)
+		spin_unlock_bh(&afinfo->udp_table->hash[state->bucket].lock);
 }
-
-int udp_seq_open(struct inode *inode, struct file *file)
-{
-	struct udp_seq_afinfo *afinfo = PDE_DATA(inode);
-	struct udp_iter_state *s;
-	int err;
-
-	err = seq_open_net(inode, file, &afinfo->seq_ops,
-			   sizeof(struct udp_iter_state));
-	if (err < 0)
-		return err;
-
-	s = ((struct seq_file *)file->private_data)->private;
-	s->family		= afinfo->family;
-	s->udp_table		= afinfo->udp_table;
-	return err;
-}
-EXPORT_SYMBOL(udp_seq_open);
-
-/* ------------------------------------------------------------------------ */
-int udp_proc_register(struct net *net, struct udp_seq_afinfo *afinfo)
-{
-	struct proc_dir_entry *p;
-	int rc = 0;
-
-	afinfo->seq_ops.start		= udp_seq_start;
-	afinfo->seq_ops.next		= udp_seq_next;
-	afinfo->seq_ops.stop		= udp_seq_stop;
-
-	p = proc_create_data(afinfo->name, 0444, net->proc_net,
-			     afinfo->seq_fops, afinfo);
-	if (!p)
-		rc = -ENOMEM;
-	return rc;
-}
-EXPORT_SYMBOL(udp_proc_register);
-
-void udp_proc_unregister(struct net *net, struct udp_seq_afinfo *afinfo)
-{
-	remove_proc_entry(afinfo->name, net->proc_net);
-}
-EXPORT_SYMBOL(udp_proc_unregister);
+EXPORT_SYMBOL(udp_seq_stop);
 
 /* ------------------------------------------------------------------------ */
 static void udp4_format_sock(struct sock *sp, struct seq_file *f,
@@ -2739,32 +2703,43 @@ int udp4_seq_show(struct seq_file *seq, void *v)
 	return 0;
 }
 
-static const struct file_operations udp_afinfo_seq_fops = {
+static const struct seq_operations udp_seq_ops = {
+	.start		= udp_seq_start,
+	.next		= udp_seq_next,
+	.stop		= udp_seq_stop,
+	.show		= udp4_seq_show,
+};
+
+static int udp_seq_open(struct inode *inode, struct file *file)
+{
+	return seq_open_net(inode, file, &udp_seq_ops,
+			sizeof(struct udp_iter_state));
+}
+
+const struct file_operations udp_afinfo_seq_fops = {
 	.open     = udp_seq_open,
 	.read     = seq_read,
 	.llseek   = seq_lseek,
 	.release  = seq_release_net
 };
+EXPORT_SYMBOL(udp_afinfo_seq_fops);
 
-/* ------------------------------------------------------------------------ */
 static struct udp_seq_afinfo udp4_seq_afinfo = {
-	.name		= "udp",
 	.family		= AF_INET,
 	.udp_table	= &udp_table,
-	.seq_fops	= &udp_afinfo_seq_fops,
-	.seq_ops	= {
-		.show		= udp4_seq_show,
-	},
 };
 
 static int __net_init udp4_proc_init_net(struct net *net)
 {
-	return udp_proc_register(net, &udp4_seq_afinfo);
+	if (!proc_create_data("udp", 0444, net->proc_net, &udp_afinfo_seq_fops,
+			&udp4_seq_afinfo))
+		return -ENOMEM;
+	return 0;
 }
 
 static void __net_exit udp4_proc_exit_net(struct net *net)
 {
-	udp_proc_unregister(net, &udp4_seq_afinfo);
+	remove_proc_entry("udp", net->proc_net);
 }
 
 static struct pernet_operations udp4_net_ops = {
diff --git a/net/ipv4/udplite.c b/net/ipv4/udplite.c
index f96614e9b9a5..4a6e67bfbe0d 100644
--- a/net/ipv4/udplite.c
+++ b/net/ipv4/udplite.c
@@ -14,6 +14,7 @@
 #define pr_fmt(fmt) "UDPLite: " fmt
 
 #include <linux/export.h>
+#include <linux/proc_fs.h>
 #include "udp_impl.h"
 
 struct udp_table 	udplite_table __read_mostly;
@@ -73,32 +74,22 @@ static struct inet_protosw udplite4_protosw = {
 };
 
 #ifdef CONFIG_PROC_FS
-
-static const struct file_operations udplite_afinfo_seq_fops = {
-	.open     = udp_seq_open,
-	.read     = seq_read,
-	.llseek   = seq_lseek,
-	.release  = seq_release_net
-};
-
 static struct udp_seq_afinfo udplite4_seq_afinfo = {
-	.name		= "udplite",
 	.family		= AF_INET,
 	.udp_table 	= &udplite_table,
-	.seq_fops	= &udplite_afinfo_seq_fops,
-	.seq_ops	= {
-		.show		= udp4_seq_show,
-	},
 };
 
 static int __net_init udplite4_proc_init_net(struct net *net)
 {
-	return udp_proc_register(net, &udplite4_seq_afinfo);
+	if (!proc_create_data("udplite", 0444, net->proc_net,
+			&udp_afinfo_seq_fops, &udplite4_seq_afinfo))
+		return -ENOMEM;
+	return 0;
 }
 
 static void __net_exit udplite4_proc_exit_net(struct net *net)
 {
-	udp_proc_unregister(net, &udplite4_seq_afinfo);
+	remove_proc_entry("udplite", net->proc_net);
 }
 
 static struct pernet_operations udplite4_net_ops = {
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 4ec76a87aeb8..68f11d6e3912 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -1480,31 +1480,43 @@ int udp6_seq_show(struct seq_file *seq, void *v)
 	return 0;
 }
 
-static const struct file_operations udp6_afinfo_seq_fops = {
-	.open     = udp_seq_open,
+static const struct seq_operations udp6_seq_ops = {
+	.start		= udp_seq_start,
+	.next		= udp_seq_next,
+	.stop		= udp_seq_stop,
+	.show		= udp6_seq_show,
+};
+
+static int udp6_seq_open(struct inode *inode, struct file *file)
+{
+	return seq_open_net(inode, file, &udp6_seq_ops,
+			sizeof(struct udp_iter_state));
+}
+
+const struct file_operations udp6_afinfo_seq_fops = {
+	.open     = udp6_seq_open,
 	.read     = seq_read,
 	.llseek   = seq_lseek,
 	.release  = seq_release_net
 };
+EXPORT_SYMBOL(udp6_afinfo_seq_fops);
 
 static struct udp_seq_afinfo udp6_seq_afinfo = {
-	.name		= "udp6",
 	.family		= AF_INET6,
 	.udp_table	= &udp_table,
-	.seq_fops	= &udp6_afinfo_seq_fops,
-	.seq_ops	= {
-		.show		= udp6_seq_show,
-	},
 };
 
 int __net_init udp6_proc_init(struct net *net)
 {
-	return udp_proc_register(net, &udp6_seq_afinfo);
+	if (!proc_create_data("udp6", 0444, net->proc_net,
+			&udp6_afinfo_seq_fops, &udp6_seq_afinfo))
+		return -ENOMEM;
+	return 0;
 }
 
 void udp6_proc_exit(struct net *net)
 {
-	udp_proc_unregister(net, &udp6_seq_afinfo);
+	remove_proc_entry("udp6", net->proc_net);
 }
 #endif /* CONFIG_PROC_FS */
 
diff --git a/net/ipv6/udplite.c b/net/ipv6/udplite.c
index 14ae32bb1f3d..a119e57196b5 100644
--- a/net/ipv6/udplite.c
+++ b/net/ipv6/udplite.c
@@ -12,6 +12,7 @@
  *		2 of the License, or (at your option) any later version.
  */
 #include <linux/export.h>
+#include <linux/proc_fs.h>
 #include "udp_impl.h"
 
 static int udplitev6_rcv(struct sk_buff *skb)
@@ -92,32 +93,22 @@ void udplitev6_exit(void)
 }
 
 #ifdef CONFIG_PROC_FS
-
-static const struct file_operations udplite6_afinfo_seq_fops = {
-	.open     = udp_seq_open,
-	.read     = seq_read,
-	.llseek   = seq_lseek,
-	.release  = seq_release_net
-};
-
 static struct udp_seq_afinfo udplite6_seq_afinfo = {
-	.name		= "udplite6",
 	.family		= AF_INET6,
 	.udp_table	= &udplite_table,
-	.seq_fops	= &udplite6_afinfo_seq_fops,
-	.seq_ops	= {
-		.show		= udp6_seq_show,
-	},
 };
 
 static int __net_init udplite6_proc_init_net(struct net *net)
 {
-	return udp_proc_register(net, &udplite6_seq_afinfo);
+	if (!proc_create_data("udplite6", 0444, net->proc_net,
+			&udp6_afinfo_seq_fops, &udplite6_seq_afinfo))
+		return -ENOMEM;
+	return 0;
 }
 
 static void __net_exit udplite6_proc_exit_net(struct net *net)
 {
-	udp_proc_unregister(net, &udplite6_seq_afinfo);
+	remove_proc_entry("udplite6", net->proc_net);
 }
 
 static struct pernet_operations udplite6_net_ops = {
-- 
2.17.0

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  parent reply	other threads:[~2018-04-25 15:47 UTC|newest]

Thread overview: 69+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-25 15:47 simplify procfs code for seq_file instances V2 Christoph Hellwig
2018-04-25 15:47 ` [PATCH 01/40] net/can: single_open_net needs to be paired with single_release_net Christoph Hellwig
2018-04-25 15:47 ` [PATCH 02/40] proc: simplify proc_register calling conventions Christoph Hellwig
2018-04-25 15:47 ` [PATCH 03/40] proc: add a proc_create_reg helper Christoph Hellwig
2018-04-25 15:47 ` [PATCH 04/40] proc: introduce proc_create_seq{,_data} Christoph Hellwig
2018-04-25 15:47 ` [PATCH 05/40] proc: introduce proc_create_seq_private Christoph Hellwig
2018-04-25 15:47 ` [PATCH 06/40] proc: introduce proc_create_single{,_data} Christoph Hellwig
2018-04-26  1:45   ` Finn Thain
2018-05-15 13:58     ` Christoph Hellwig
2018-04-25 15:47 ` Christoph Hellwig [this message]
2018-04-25 15:47 ` [PATCH 08/40] ipv{4,6}/tcp: simplify procfs registration Christoph Hellwig
2018-04-25 15:47 ` [PATCH 09/40] ipv{4,6}/ping: simplify proc file creation Christoph Hellwig
2018-04-25 15:47 ` [PATCH 10/40] ipv{4, 6}/raw: simplify ѕeq_file code Christoph Hellwig
2018-04-25 15:47 ` [PATCH 11/40] ipv6/flowlabel: simplify pid namespace lookup Christoph Hellwig
2018-05-05 12:37   ` Eric W. Biederman
2018-05-15 14:56     ` Christoph Hellwig
2018-05-17  5:28       ` Eric W. Biederman
2018-05-17  6:42         ` Christoph Hellwig
2018-05-17 19:14           ` Eric W. Biederman
2018-04-25 15:47 ` [PATCH 12/40] net/kcm: simplify proc registration Christoph Hellwig
2018-04-25 15:48 ` [PATCH 13/40] netfilter/x_tables: simplify ѕeq_file code Christoph Hellwig
2018-04-25 15:48 ` [PATCH 14/40] net: move seq_file_single_net to <linux/seq_file_net.h> Christoph Hellwig
2018-04-25 15:48 ` [PATCH 15/40] proc: introduce proc_create_net{,_data} Christoph Hellwig
2018-04-25 15:48 ` [PATCH 16/40] proc: introduce proc_create_net_single Christoph Hellwig
2018-04-25 15:48 ` [PATCH 17/40] acpi/battery: simplify procfs code Christoph Hellwig
2018-04-25 15:48 ` [PATCH 18/40] sgi-gru: " Christoph Hellwig
2018-04-25 15:48 ` [PATCH 19/40] megaraid: " Christoph Hellwig
2018-04-25 15:48 ` [PATCH 20/40] sg: " Christoph Hellwig
2018-04-25 15:48 ` [PATCH 21/40] afs: " Christoph Hellwig
2018-04-30 23:20   ` [PATCH 0/3] afs: Network-namespacing and proc David Howells
2018-04-30 23:20     ` [PATCH 1/3] afs: Rearrange fs/afs/proc.c David Howells
2018-05-15 13:43       ` Christoph Hellwig
2018-04-30 23:20     ` [PATCH 2/3] proc: Add a way to make network proc files writable David Howells
2018-05-15 13:48       ` Christoph Hellwig
2018-05-15 14:16       ` David Howells
2018-04-30 23:20     ` [PATCH 3/3] afs: Implement namespacing David Howells
2018-05-15 13:53       ` Christoph Hellwig
2018-05-15 14:28       ` 'Adding' a writable proc file under /proc/net/afs/ [was [PATCH 3/3] afs: Implement namespacing] David Howells
2018-04-25 15:48 ` [PATCH 22/40] ext4: simplify procfs code Christoph Hellwig
2018-04-25 15:48 ` [PATCH 23/40] jfs: " Christoph Hellwig
2018-04-25 15:48 ` [PATCH 24/40] staging/rtl8192u: " Christoph Hellwig
2018-04-25 15:48 ` [PATCH 25/40] resource: switch to proc_create_seq_data Christoph Hellwig
2018-04-25 15:48 ` [PATCH 26/40] drbd: switch to proc_create_single Christoph Hellwig
2018-04-25 15:48 ` [PATCH 27/40] rtc/proc: switch to proc_create_single_data Christoph Hellwig
2018-04-25 18:25   ` Alexandre Belloni
2018-04-25 15:48 ` [PATCH 28/40] bonding: switch to proc_create_seq_data Christoph Hellwig
2018-04-25 15:48 ` [PATCH 29/40] hostap: switch to proc_create_{seq,single}_data Christoph Hellwig
2018-04-25 15:48 ` [PATCH 30/40] neigh: switch to proc_create_seq_data Christoph Hellwig
2018-04-25 15:48 ` [PATCH 31/40] netfilter/xt_hashlimit: switch to proc_create_{seq, single}_data Christoph Hellwig
2018-04-25 15:48 ` [PATCH 32/40] netfilter/x_tables: switch to proc_create_seq_private Christoph Hellwig
2018-04-25 15:48 ` [PATCH 33/40] bluetooth: switch to proc_create_seq_data Christoph Hellwig
2018-04-25 15:48 ` [PATCH 34/40] atm: simplify procfs code Christoph Hellwig
2018-05-05 12:51   ` Eric W. Biederman
2018-05-15 14:12     ` Christoph Hellwig
2018-05-17  1:15       ` Eric W. Biederman
2018-04-25 15:48 ` [PATCH 35/40] atm: switch to proc_create_seq_private Christoph Hellwig
2018-04-25 15:48 ` [PATCH 36/40] isdn: replace ->proc_fops with ->proc_show Christoph Hellwig
2018-04-25 15:48 ` [PATCH 37/40] proc: don't detour through seq->private to get the inode Christoph Hellwig
2018-04-25 15:48 ` [PATCH 38/40] ide: remove ide_driver_proc_write Christoph Hellwig
2018-05-05 13:09   ` Eric W. Biederman
2018-04-25 15:48 ` [PATCH 39/40] ide: replace ->proc_fops with ->proc_show Christoph Hellwig
2018-04-25 15:48 ` [PATCH 40/40] tty: " Christoph Hellwig
2018-04-30 13:19 ` [PATCH 04/40] proc: introduce proc_create_seq{,_data} David Howells
2018-05-15 14:42   ` Christoph Hellwig
2018-04-30 15:38 ` simplify procfs code for seq_file instances V2 David Howells
2018-05-06 17:19 ` Alexey Dobriyan
2018-05-06 17:45   ` Al Viro
2018-05-09 16:53     ` Alexey Dobriyan
2018-05-15 14:03   ` Christoph Hellwig

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