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l2tp: remove tunnel and session debug flags field

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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: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Parkin 2020-08-22 15:59:08 +01:00 • committed by David S. Miller
parent ac6ebaf06e
commit eee049c0ef
7 changed files with 17 additions and 38 deletions
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6
include/uapi/linux/l2tp.h
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@ -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