Commit eee049c0 authored by Tom Parkin's avatar Tom Parkin Committed by David S. Miller
Browse files

l2tp: remove tunnel and session debug flags field 



The l2tp subsystem now uses standard kernel logging APIs for
informational and warning messages, and tracepoints for debug
information.

Now that the tunnel and session debug flags are unused, remove the field
from the core structures.

Various system calls (in the case of l2tp_ppp) and netlink messages
handle the getting and setting of debug flags.  To avoid userspace
breakage don't modify the API of these calls; simply ignore set
requests, and send dummy data for get requests.

Signed-off-by: default avatarTom Parkin <tparkin@katalix.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ac6ebaf0

include/uapi/linux/if_pppol2tp.h

+1 −1
Original line number Diff line number Diff line
@@ -75,7 +75,7 @@ struct pppol2tpv3in6_addr { 
};



/* Socket options:

 * DEBUG	- bitmask of debug message categories

 * DEBUG	- bitmask of debug message categories (not used)

 * SENDSEQ	- 0 => don't send packets with sequence numbers

 *		  1 => send packets with sequence numbers

 * RECVSEQ	- 0 => receive packet sequence numbers are optional

include/uapi/linux/l2tp.h

+4 −2
Original line number Diff line number Diff line
@@ -108,7 +108,7 @@ enum { 
	L2TP_ATTR_VLAN_ID,		/* u16 (not used) */

	L2TP_ATTR_COOKIE,		/* 0, 4 or 8 bytes */

	L2TP_ATTR_PEER_COOKIE,		/* 0, 4 or 8 bytes */

	L2TP_ATTR_DEBUG,		/* u32, enum l2tp_debug_flags */

	L2TP_ATTR_DEBUG,		/* u32, enum l2tp_debug_flags (not used) */

	L2TP_ATTR_RECV_SEQ,		/* u8 */

	L2TP_ATTR_SEND_SEQ,		/* u8 */

	L2TP_ATTR_LNS_MODE,		/* u8 */
@@ -177,7 +177,9 @@ enum l2tp_seqmode { 
};



/**

 * enum l2tp_debug_flags - debug message categories for L2TP tunnels/sessions

 * enum l2tp_debug_flags - debug message categories for L2TP tunnels/sessions.

 *

 * Unused.

 *

 * @L2TP_MSG_DEBUG: verbose debug (if compiled in)

 * @L2TP_MSG_CONTROL: userspace - kernel interface

net/l2tp/l2tp_core.c

+0 −8
Original line number Diff line number Diff line
@@ -1401,16 +1401,12 @@ int l2tp_tunnel_create(struct net *net, int fd, int version, u32 tunnel_id, u32 
	tunnel->version = version;

	tunnel->tunnel_id = tunnel_id;

	tunnel->peer_tunnel_id = peer_tunnel_id;

	tunnel->debug = L2TP_DEFAULT_DEBUG_FLAGS;



	tunnel->magic = L2TP_TUNNEL_MAGIC;

	sprintf(&tunnel->name[0], "tunl %u", tunnel_id);

	rwlock_init(&tunnel->hlist_lock);

	tunnel->acpt_newsess = true;



	if (cfg)

		tunnel->debug = cfg->debug;



	tunnel->encap = encap;



	refcount_set(&tunnel->ref_count, 1);
@@ -1608,12 +1604,8 @@ struct l2tp_session *l2tp_session_create(int priv_size, struct l2tp_tunnel *tunn 
		INIT_HLIST_NODE(&session->hlist);

		INIT_HLIST_NODE(&session->global_hlist);



		/* Inherit debug options from tunnel */

		session->debug = tunnel->debug;



		if (cfg) {

			session->pwtype = cfg->pw_type;

			session->debug = cfg->debug;

			session->send_seq = cfg->send_seq;

			session->recv_seq = cfg->recv_seq;

			session->lns_mode = cfg->lns_mode;

net/l2tp/l2tp_core.h

+0 −4
Original line number Diff line number Diff line
@@ -51,7 +51,6 @@ struct l2tp_session_cfg { 
	unsigned int		lns_mode:1;	/* behave as LNS?

						 * LAC enables sequence numbers under LNS control.

						 */

	int			debug;		/* bitmask of debug message categories */

	u16			l2specific_type; /* Layer 2 specific type */

	u8			cookie[8];	/* optional cookie */

	int			cookie_len;	/* 0, 4 or 8 bytes */
@@ -98,7 +97,6 @@ struct l2tp_session { 
	unsigned int		lns_mode:1;	/* behave as LNS?

						 * LAC enables sequence numbers under LNS control.

						 */

	int			debug;		/* bitmask of debug message categories */

	int			reorder_timeout; /* configured reorder timeout (in jiffies) */

	int			reorder_skip;	/* set if skip to next nr */

	enum l2tp_pwtype	pwtype;
@@ -132,7 +130,6 @@ struct l2tp_session { 


/* L2TP tunnel configuration */

struct l2tp_tunnel_cfg {

	int			debug;		/* bitmask of debug message categories */

	enum l2tp_encap_type	encap;



	/* Used only for kernel-created sockets */
@@ -173,7 +170,6 @@ struct l2tp_tunnel { 
	int			version;	/* 2=>L2TPv2, 3=>L2TPv3 */



	char			name[L2TP_TUNNEL_NAME_MAX]; /* for logging */

	int			debug;		/* bitmask of debug message categories */

	enum l2tp_encap_type	encap;

	struct l2tp_stats	stats;

net/l2tp/l2tp_debugfs.c

+2 −2
Original line number Diff line number Diff line
@@ -167,7 +167,7 @@ static void l2tp_dfs_seq_tunnel_show(struct seq_file *m, void *v) 
		   tunnel->sock ? refcount_read(&tunnel->sock->sk_refcnt) : 0,

		   refcount_read(&tunnel->ref_count));

	seq_printf(m, " %08x rx %ld/%ld/%ld rx %ld/%ld/%ld\n",

		   tunnel->debug,

		   0,

		   atomic_long_read(&tunnel->stats.tx_packets),

		   atomic_long_read(&tunnel->stats.tx_bytes),

		   atomic_long_read(&tunnel->stats.tx_errors),
@@ -192,7 +192,7 @@ static void l2tp_dfs_seq_session_show(struct seq_file *m, void *v) 
		   session->recv_seq ? 'R' : '-',

		   session->send_seq ? 'S' : '-',

		   session->lns_mode ? "LNS" : "LAC",

		   session->debug,

		   0,

		   jiffies_to_msecs(session->reorder_timeout));

	seq_printf(m, "   offset 0 l2specific %hu/%hu\n",

		   session->l2specific_type, l2tp_get_l2specific_len(session));

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