[Bluetooth]: Remove the usage of /proc completely

This patch removes all relics of the /proc usage from the Bluetooth
subsystem core and its upper layers. All the previous information are
now available via /sys/class/bluetooth through appropriate functions.

Signed-off-by: Marcel Holtmann <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

include/net/bluetooth/bluetooth.h

···
 #define BT_DBG(fmt, arg...)  printk(KERN_INFO "%s: " fmt "\n" , __FUNCTION__ , ## arg)
 #define BT_ERR(fmt, arg...)  printk(KERN_ERR  "%s: " fmt "\n" , __FUNCTION__ , ## arg)
 
-extern struct proc_dir_entry *proc_bt;
-
 /* Connection and socket states */
 enum {
 	BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */
···
 
 extern int bt_sysfs_init(void);
 extern void bt_sysfs_cleanup(void);
+
+extern struct class bt_class;
 
 #endif /* __BLUETOOTH_H */

include/net/bluetooth/hci_core.h

···
 #ifndef __HCI_CORE_H
 #define __HCI_CORE_H
 
-#include <linux/proc_fs.h>
 #include <net/bluetooth/hci.h>
 
 /* HCI upper protocols */
···
 #define HCI_PROTO_SCO	1
 
 #define HCI_INIT_TIMEOUT (HZ * 10)
-
-extern struct proc_dir_entry *proc_bt_hci;
 
 /* HCI Core structures */
 
···
 	void			*core_data;
 
 	atomic_t 		promisc;
-
-#ifdef CONFIG_PROC_FS
-	struct proc_dir_entry	*proc;
-#endif
 
 	struct class_device	class_dev;
 

include/net/bluetooth/rfcomm.h

···
 int  rfcomm_init_ttys(void);
 void rfcomm_cleanup_ttys(void);
 
-extern struct proc_dir_entry *proc_bt_rfcomm;
-
 #endif /* __RFCOMM_H */

net/bluetooth/af_bluetooth.c

···
 #include <linux/skbuff.h>
 #include <linux/init.h>
 #include <linux/poll.h>
-#include <linux/proc_fs.h>
 #include <net/sock.h>
 
 #if defined(CONFIG_KMOD)
···
 #define BT_DBG(D...)
 #endif
 
-#define VERSION "2.7"
-
-struct proc_dir_entry *proc_bt;
-EXPORT_SYMBOL(proc_bt);
+#define VERSION "2.8"
 
 /* Bluetooth sockets */
 #define BT_MAX_PROTO	8
···
 {
 	BT_INFO("Core ver %s", VERSION);
 
-	proc_bt = proc_mkdir("bluetooth", NULL);
-	if (proc_bt)
-		proc_bt->owner = THIS_MODULE;
-
 	sock_register(&bt_sock_family_ops);
 
 	BT_INFO("HCI device and connection manager initialized");
···
 	bt_sysfs_cleanup();
 
 	sock_unregister(PF_BLUETOOTH);
-
-	remove_proc_entry("bluetooth", NULL);
 }
 
 subsys_initcall(bt_init);

net/bluetooth/hci_sysfs.c

···
 	kfree(hdev);
 }
 
-static struct class bt_class = {
+struct class bt_class = {
 	.name		= "bluetooth",
 	.release	= bt_release,
 #ifdef CONFIG_HOTPLUG
 	.hotplug	= bt_hotplug,
 #endif
 };
+
+EXPORT_SYMBOL_GPL(bt_class);
 
 int hci_register_sysfs(struct hci_dev *hdev)
 {

net/bluetooth/l2cap.c

···
 #include <linux/interrupt.h>
 #include <linux/socket.h>
 #include <linux/skbuff.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
 #include <linux/list.h>
+#include <linux/device.h>
 #include <net/sock.h>
 
 #include <asm/system.h>
···
 #define BT_DBG(D...)
 #endif
 
-#define VERSION "2.7"
+#define VERSION "2.8"
 
 static struct proto_ops l2cap_sock_ops;
 
···
 	return 0;
 }
 
-/* ---- Proc fs support ---- */
-#ifdef CONFIG_PROC_FS
-static void *l2cap_seq_start(struct seq_file *seq, loff_t *pos)
+static ssize_t l2cap_sysfs_show(struct class *dev, char *buf)
 {
 	struct sock *sk;
 	struct hlist_node *node;
-	loff_t l = *pos;
+	char *str = buf;
 
 	read_lock_bh(&l2cap_sk_list.lock);
 
-	sk_for_each(sk, node, &l2cap_sk_list.head)
-		if (!l--)
-			goto found;
-	sk = NULL;
-found:
-	return sk;
-}
+	sk_for_each(sk, node, &l2cap_sk_list.head) {
+		struct l2cap_pinfo *pi = l2cap_pi(sk);
 
-static void *l2cap_seq_next(struct seq_file *seq, void *e, loff_t *pos)
-{
-	(*pos)++;
-	return sk_next(e);
-}
+		str += sprintf(str, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d 0x%x\n",
+				batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst),
+				sk->sk_state, pi->psm, pi->scid, pi->dcid, pi->imtu,
+				pi->omtu, pi->link_mode);
+	}
 
-static void l2cap_seq_stop(struct seq_file *seq, void *e)
-{
 	read_unlock_bh(&l2cap_sk_list.lock);
+
+	return (str - buf);
 }
 
-static int  l2cap_seq_show(struct seq_file *seq, void *e)
-{
-	struct sock *sk = e;
-	struct l2cap_pinfo *pi = l2cap_pi(sk);
-
-	seq_printf(seq, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d 0x%x\n",
-			batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst), 
-			sk->sk_state, pi->psm, pi->scid, pi->dcid, pi->imtu,
-			pi->omtu, pi->link_mode);
-	return 0;
-}
-
-static struct seq_operations l2cap_seq_ops = {
-	.start	= l2cap_seq_start,
-	.next	= l2cap_seq_next,
-	.stop	= l2cap_seq_stop,
-	.show	= l2cap_seq_show 
-};
-
-static int l2cap_seq_open(struct inode *inode, struct file *file)
-{
-	return seq_open(file, &l2cap_seq_ops);
-}
-
-static struct file_operations l2cap_seq_fops = {
-	.owner		= THIS_MODULE,
-	.open		= l2cap_seq_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= seq_release,
-};
-
-static int __init l2cap_proc_init(void)
-{
-	struct proc_dir_entry *p = create_proc_entry("l2cap", S_IRUGO, proc_bt);
-	if (!p)
-		return -ENOMEM;
-	p->owner     = THIS_MODULE;
-	p->proc_fops = &l2cap_seq_fops;
-	return 0;
-}
-
-static void __exit l2cap_proc_cleanup(void)
-{
-	remove_proc_entry("l2cap", proc_bt);
-}
-
-#else /* CONFIG_PROC_FS */
-
-static int __init l2cap_proc_init(void)
-{
-	return 0;
-}
-
-static void __exit l2cap_proc_cleanup(void)
-{
-	return;
-}
-#endif /* CONFIG_PROC_FS */
+static CLASS_ATTR(l2cap, S_IRUGO, l2cap_sysfs_show, NULL);
 
 static struct proto_ops l2cap_sock_ops = {
 	.family		= PF_BLUETOOTH,
···
 static int __init l2cap_init(void)
 {
 	int err;
-	
+
 	err = proto_register(&l2cap_proto, 0);
 	if (err < 0)
 		return err;
···
 		goto error;
 	}
 
-	l2cap_proc_init();
+	class_create_file(&bt_class, &class_attr_l2cap);
 
 	BT_INFO("L2CAP ver %s", VERSION);
 	BT_INFO("L2CAP socket layer initialized");
···
 
 static void __exit l2cap_exit(void)
 {
-	l2cap_proc_cleanup();
+	class_remove_file(&bt_class, &class_attr_l2cap);
 
 	if (bt_sock_unregister(BTPROTO_L2CAP) < 0)
 		BT_ERR("L2CAP socket unregistration failed");

net/bluetooth/rfcomm/core.c

···
 #include <linux/signal.h>
 #include <linux/init.h>
 #include <linux/wait.h>
+#include <linux/device.h>
 #include <linux/net.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
 #include <net/sock.h>
 #include <asm/uaccess.h>
 #include <asm/unaligned.h>
···
 #include <net/bluetooth/l2cap.h>
 #include <net/bluetooth/rfcomm.h>
 
-#define VERSION "1.5"
+#define VERSION "1.6"
 
 #ifndef CONFIG_BT_RFCOMM_DEBUG
 #undef  BT_DBG
 #define BT_DBG(D...)
-#endif
-
-#ifdef CONFIG_PROC_FS
-struct proc_dir_entry *proc_bt_rfcomm;
 #endif
 
 static struct task_struct *rfcomm_thread;
···
 	.encrypt_cfm	= rfcomm_encrypt_cfm
 };
 
-/* ---- Proc fs support ---- */
-#ifdef CONFIG_PROC_FS
-static void *rfcomm_seq_start(struct seq_file *seq, loff_t *pos)
+static ssize_t rfcomm_dlc_sysfs_show(struct class *dev, char *buf)
 {
 	struct rfcomm_session *s;
 	struct list_head *pp, *p;
-	loff_t l = *pos;
+	char *str = buf;
 
 	rfcomm_lock();
 
 	list_for_each(p, &session_list) {
 		s = list_entry(p, struct rfcomm_session, list);
-		list_for_each(pp, &s->dlcs)
-			if (!l--) {
-				seq->private = s;
-				return pp;
-			}
-	}
-	return NULL;
-}
+		list_for_each(pp, &s->dlcs) {
+			struct sock *sk = s->sock->sk;
+			struct rfcomm_dlc *d = list_entry(pp, struct rfcomm_dlc, list);
 
-static void *rfcomm_seq_next(struct seq_file *seq, void *e, loff_t *pos)
-{
-	struct rfcomm_session *s = seq->private;
-	struct list_head *pp, *p = e;
-	(*pos)++;
-
-	if (p->next != &s->dlcs)
-		return p->next;
-
-	list_for_each(p, &session_list) {
-		s = list_entry(p, struct rfcomm_session, list);
-		__list_for_each(pp, &s->dlcs) {
-			seq->private = s;
-			return pp;
+			str += sprintf(str, "%s %s %ld %d %d %d %d\n",
+					batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst),
+					d->state, d->dlci, d->mtu, d->rx_credits, d->tx_credits);
 		}
 	}
-	return NULL;
-}
 
-static void rfcomm_seq_stop(struct seq_file *seq, void *e)
-{
 	rfcomm_unlock();
+
+	return (str - buf);
 }
 
-static int  rfcomm_seq_show(struct seq_file *seq, void *e)
-{
-	struct rfcomm_session *s = seq->private;
-	struct sock *sk = s->sock->sk;
-	struct rfcomm_dlc *d = list_entry(e, struct rfcomm_dlc, list);
-
-	seq_printf(seq, "%s %s %ld %d %d %d %d\n",
-			batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst),
-			d->state, d->dlci, d->mtu, d->rx_credits, d->tx_credits);
-	return 0;
-}
-
-static struct seq_operations rfcomm_seq_ops = {
-	.start  = rfcomm_seq_start,
-	.next   = rfcomm_seq_next,
-	.stop   = rfcomm_seq_stop,
-	.show   = rfcomm_seq_show 
-};
-
-static int rfcomm_seq_open(struct inode *inode, struct file *file)
-{
-	return seq_open(file, &rfcomm_seq_ops);
-}
-
-static struct file_operations rfcomm_seq_fops = {
-	.owner	 = THIS_MODULE,
-	.open    = rfcomm_seq_open,
-	.read    = seq_read,
-	.llseek  = seq_lseek,
-	.release = seq_release,
-};
-
-static int  __init rfcomm_proc_init(void)
-{
-        struct proc_dir_entry *p;
-
-	proc_bt_rfcomm = proc_mkdir("rfcomm", proc_bt);
-	if (proc_bt_rfcomm) {
-		proc_bt_rfcomm->owner = THIS_MODULE;
-
-        	p = create_proc_entry("dlc", S_IRUGO, proc_bt_rfcomm);
-		if (p)
-        		p->proc_fops = &rfcomm_seq_fops;
-	}
-        return 0;
-}
-
-static void __exit rfcomm_proc_cleanup(void)
-{
-        remove_proc_entry("dlc", proc_bt_rfcomm);
-
-	remove_proc_entry("rfcomm", proc_bt);
-}
-
-#else /* CONFIG_PROC_FS */
-
-static int  __init rfcomm_proc_init(void)
-{
-        return 0;
-}
-
-static void __exit rfcomm_proc_cleanup(void)
-{
-        return;
-}
-#endif /* CONFIG_PROC_FS */
+static CLASS_ATTR(rfcomm_dlc, S_IRUGO, rfcomm_dlc_sysfs_show, NULL);
 
 /* ---- Initialization ---- */
 static int __init rfcomm_init(void)
···
 
 	kernel_thread(rfcomm_run, NULL, CLONE_KERNEL);
 
-	BT_INFO("RFCOMM ver %s", VERSION);
-
-	rfcomm_proc_init();
+	class_create_file(&bt_class, &class_attr_rfcomm_dlc);
 
 	rfcomm_init_sockets();
 
···
 	rfcomm_init_ttys();
 #endif
 
+	BT_INFO("RFCOMM ver %s", VERSION);
+
 	return 0;
 }
 
 static void __exit rfcomm_exit(void)
 {
+	class_remove_file(&bt_class, &class_attr_rfcomm_dlc);
+
 	hci_unregister_cb(&rfcomm_cb);
 
 	/* Terminate working thread.
···
 #endif
 
 	rfcomm_cleanup_sockets();
-
-	rfcomm_proc_cleanup();
 }
 
 module_init(rfcomm_init);

net/bluetooth/rfcomm/sock.c

···
 #include <linux/socket.h>
 #include <linux/skbuff.h>
 #include <linux/list.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
+#include <linux/device.h>
 #include <net/sock.h>
 
 #include <asm/system.h>
···
 	return result;
 }
 
-/* ---- Proc fs support ---- */
-#ifdef CONFIG_PROC_FS
-static void *rfcomm_seq_start(struct seq_file *seq, loff_t *pos)
+static ssize_t rfcomm_sock_sysfs_show(struct class *dev, char *buf)
 {
 	struct sock *sk;
 	struct hlist_node *node;
-	loff_t l = *pos;
+	char *str = buf;
 
 	read_lock_bh(&rfcomm_sk_list.lock);
 
-	sk_for_each(sk, node, &rfcomm_sk_list.head)
-		if (!l--)
-			return sk;
-	return NULL;
-}
+	sk_for_each(sk, node, &rfcomm_sk_list.head) {
+		str += sprintf(str, "%s %s %d %d\n",
+				batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst),
+				sk->sk_state, rfcomm_pi(sk)->channel);
+	}
 
-static void *rfcomm_seq_next(struct seq_file *seq, void *e, loff_t *pos)
-{
-	struct sock *sk = e;
-	(*pos)++;
-	return sk_next(sk);
-}
-
-static void rfcomm_seq_stop(struct seq_file *seq, void *e)
-{
 	read_unlock_bh(&rfcomm_sk_list.lock);
+
+	return (str - buf);
 }
 
-static int  rfcomm_seq_show(struct seq_file *seq, void *e)
-{
-	struct sock *sk = e;
-	seq_printf(seq, "%s %s %d %d\n",
-			batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst),
-			sk->sk_state, rfcomm_pi(sk)->channel);
-	return 0;
-}
-
-static struct seq_operations rfcomm_seq_ops = {
-	.start  = rfcomm_seq_start,
-	.next   = rfcomm_seq_next,
-	.stop   = rfcomm_seq_stop,
-	.show   = rfcomm_seq_show 
-};
-
-static int rfcomm_seq_open(struct inode *inode, struct file *file)
-{
-	return seq_open(file, &rfcomm_seq_ops);
-}
-
-static struct file_operations rfcomm_seq_fops = {
-	.owner	 = THIS_MODULE,
-	.open    = rfcomm_seq_open,
-	.read    = seq_read,
-	.llseek  = seq_lseek,
-	.release = seq_release,
-};
-
-static int  __init rfcomm_sock_proc_init(void)
-{
-        struct proc_dir_entry *p = create_proc_entry("sock", S_IRUGO, proc_bt_rfcomm);
-        if (!p)
-                return -ENOMEM;
-        p->proc_fops = &rfcomm_seq_fops;
-        return 0;
-}
-
-static void __exit rfcomm_sock_proc_cleanup(void)
-{
-        remove_proc_entry("sock", proc_bt_rfcomm);
-}
-
-#else /* CONFIG_PROC_FS */
-
-static int  __init rfcomm_sock_proc_init(void)
-{
-        return 0;
-}
-
-static void __exit rfcomm_sock_proc_cleanup(void)
-{
-        return;
-}
-#endif /* CONFIG_PROC_FS */
+static CLASS_ATTR(rfcomm, S_IRUGO, rfcomm_sock_sysfs_show, NULL);
 
 static struct proto_ops rfcomm_sock_ops = {
 	.family		= PF_BLUETOOTH,
···
 	.create		= rfcomm_sock_create
 };
 
-int  __init rfcomm_init_sockets(void)
+int __init rfcomm_init_sockets(void)
 {
 	int err;
 
···
 	if (err < 0)
 		goto error;
 
-	rfcomm_sock_proc_init();
+	class_create_file(&bt_class, &class_attr_rfcomm);
 
 	BT_INFO("RFCOMM socket layer initialized");
 
···
 
 void __exit rfcomm_cleanup_sockets(void)
 {
-	rfcomm_sock_proc_cleanup();
+	class_remove_file(&bt_class, &class_attr_rfcomm);
 
 	if (bt_sock_unregister(BTPROTO_RFCOMM) < 0)
 		BT_ERR("RFCOMM socket layer unregistration failed");

net/bluetooth/sco.c

···
 #include <linux/interrupt.h>
 #include <linux/socket.h>
 #include <linux/skbuff.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
+#include <linux/device.h>
 #include <linux/list.h>
 #include <net/sock.h>
 
···
 #define BT_DBG(D...)
 #endif
 
-#define VERSION "0.4"
+#define VERSION "0.5"
 
 static struct proto_ops sco_sock_ops;
 
···
 	return 0;
 }
 
-/* ---- Proc fs support ---- */
-#ifdef CONFIG_PROC_FS
-static void *sco_seq_start(struct seq_file *seq, loff_t *pos)
+static ssize_t sco_sysfs_show(struct class *dev, char *buf)
 {
 	struct sock *sk;
 	struct hlist_node *node;
-	loff_t l = *pos;
+	char *str = buf;
 
 	read_lock_bh(&sco_sk_list.lock);
 
-	sk_for_each(sk, node, &sco_sk_list.head)
-		if (!l--)
-			goto found;
-	sk = NULL;
-found:
-	return sk;
-}
+	sk_for_each(sk, node, &sco_sk_list.head) {
+		str += sprintf(str, "%s %s %d\n",
+				batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst),
+				sk->sk_state);
+	}
 
-static void *sco_seq_next(struct seq_file *seq, void *e, loff_t *pos)
-{
-	struct sock *sk = e;
-	(*pos)++;
-	return sk_next(sk);
-}
-
-static void sco_seq_stop(struct seq_file *seq, void *e)
-{
 	read_unlock_bh(&sco_sk_list.lock);
+
+	return (str - buf);
 }
 
-static int  sco_seq_show(struct seq_file *seq, void *e)
-{
-	struct sock *sk = e;
-	seq_printf(seq, "%s %s %d\n",
-			batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst), sk->sk_state);
-	return 0;
-}
-
-static struct seq_operations sco_seq_ops = {
-	.start	= sco_seq_start,
-	.next	= sco_seq_next,
-	.stop	= sco_seq_stop,
-	.show	= sco_seq_show 
-};
-
-static int sco_seq_open(struct inode *inode, struct file *file)
-{
-	return seq_open(file, &sco_seq_ops);
-}
-
-static struct file_operations sco_seq_fops = {
-	.owner		= THIS_MODULE,
-	.open		= sco_seq_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= seq_release,
-};
-
-static int __init sco_proc_init(void)
-{
-	struct proc_dir_entry *p = create_proc_entry("sco", S_IRUGO, proc_bt);
-	if (!p)
-		return -ENOMEM;
-	p->owner     = THIS_MODULE;
-	p->proc_fops = &sco_seq_fops;
-	return 0;
-}
-
-static void __exit sco_proc_cleanup(void)
-{
-	remove_proc_entry("sco", proc_bt);
-}
-
-#else /* CONFIG_PROC_FS */
-
-static int __init sco_proc_init(void)
-{
-	return 0;
-}
-
-static void __exit sco_proc_cleanup(void)
-{
-	return;
-}
-#endif /* CONFIG_PROC_FS */
+static CLASS_ATTR(sco, S_IRUGO, sco_sysfs_show, NULL);
 
 static struct proto_ops sco_sock_ops = {
 	.family		= PF_BLUETOOTH,
···
 		goto error;
 	}
 
-	sco_proc_init();
+	class_create_file(&bt_class, &class_attr_sco);
 
 	BT_INFO("SCO (Voice Link) ver %s", VERSION);
 	BT_INFO("SCO socket layer initialized");
···
 
 static void __exit sco_exit(void)
 {
-	sco_proc_cleanup();
+	class_remove_file(&bt_class, &class_attr_sco);
 
 	if (bt_sock_unregister(BTPROTO_SCO) < 0)
 		BT_ERR("SCO socket unregistration failed");