[PATCH 05/11] isdn/gigaset: improve CAPI message debugging

Tilman Schmidt
2010-07-06T00:19:19Z

Provide better control of debugging output for DATA_B3 CAPI messages
which tend to occur very frequently.

Impact: logging
Signed-off-by: Tilman Schmidt <tilman@imap.cc>
---
drivers/isdn/gigaset/capi.c | 27 ++++++++++++++++-----------
1 files changed, 16 insertions(+), 11 deletions(-)

diff --git a/drivers/isdn/gigaset/capi.c b/drivers/isdn/gigaset/capi.c
index c38750c..ff074e9 100644
--- a/drivers/isdn/gigaset/capi.c
+++ b/drivers/isdn/gigaset/capi.c
@@ -270,9 +270,13 @@ static inline void dump_rawmsg(enum debuglevel level, const char *tag,
kfree(dbgline);
if (CAPIMSG_COMMAND(data) == CAPI_DATA_B3 &&
(CAPIMSG_SUBCOMMAND(data) == CAPI_REQ ||
- CAPIMSG_SUBCOMMAND(data) == CAPI_IND) &&
- CAPIMSG_DATALEN(data) > 0) {
+ CAPIMSG_SUBCOMMAND(data) == CAPI_IND)) {
l = CAPIMSG_DATALEN(data);
+ gig_dbg(level, " DataLength=%d", l);
+ if (l <= 0 || !(gigaset_debuglevel & DEBUG_LLDATA))
+ return;
+ if (l > 64)
+ l = 64; /* arbitrary limit */
dbgline = kmalloc(3*l, GFP_ATOMIC);
if (!dbgline)
return;
@@ -384,7 +388,7 @@ void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *dskb)

/* don't send further B3 messages if disconnected */
if (bcs->apconnstate < APCONN_ACTIVE) {
- gig_dbg(DEBUG_LLDATA, "disconnected, discarding ack");
+ gig_dbg(DEBUG_MCMD, "disconnected, discarding ack");
return;
}

@@ -428,7 +432,7 @@ void gigaset_skb_rcvd(struct bc_state *bcs, struct sk_buff *skb)

/* don't send further B3 messages if disconnected */
if (bcs->apconnstate < APCONN_ACTIVE) {
- gig_dbg(DEBUG_LLDATA, "disconnected, discarding data");
+ gig_dbg(DEBUG_MCMD, "disconnected, discarding data");
dev_kfree_skb_any(skb);
return;
}
@@ -454,7 +458,7 @@ void gigaset_skb_rcvd(struct bc_state *bcs, struct sk_buff *skb)
/* Data64 parameter not present */

/* emit message */
- dump_rawmsg(DEBUG_LLDATA, "DATA_B3_IND", skb->data);
+ dump_rawmsg(DEBUG_MCMD, __func__, skb->data);
capi_ctr_handle_message(&iif->ctr, ap->id, skb);
}
EXPORT_SYMBOL_GPL(gigaset_skb_rcvd);
@@ -978,6 +982,9 @@ static void gigaset_register_appl(struct capi_ctr *ctr, u16 appl,
struct cardstate *cs = ctr->driverdata;
struct gigaset_capi_appl *ap;

+ gig_dbg(DEBUG_CMD, "%s [%u] l3cnt=%u blkcnt=%u blklen=%u",
+ __func__, appl, rp->level3cnt, rp->datablkcnt, rp->datablklen);
+
list_for_each_entry(ap, &iif->appls, ctrlist)
if (ap->id == appl) {
dev_notice(cs->dev,
@@ -1062,6 +1069,8 @@ static void gigaset_release_appl(struct capi_ctr *ctr, u16 appl)
struct gigaset_capi_appl *ap, *tmp;
unsigned ch;

+ gig_dbg(DEBUG_CMD, "%s [%u]", __func__, appl);
+
list_for_each_entry_safe(ap, tmp, &iif->appls, ctrlist)
if (ap->id == appl) {
/* remove from any channels */
@@ -1951,11 +1960,7 @@ static void do_data_b3_req(struct gigaset_capi_ctr *iif,
u16 handle = CAPIMSG_HANDLE_REQ(skb->data);

/* frequent message, avoid _cmsg overhead */
- dump_rawmsg(DEBUG_LLDATA, "DATA_B3_REQ", skb->data);
-
- gig_dbg(DEBUG_LLDATA,
- "Receiving data from LL (ch: %d, flg: %x, sz: %d|%d)",
- channel, flags, msglen, datalen);
+ dump_rawmsg(DEBUG_MCMD, __func__, skb->data);

/* check parameters */
if (channel == 0 || channel > cs->channels || ncci != 1) {
@@ -2064,7 +2069,7 @@ static void do_data_b3_resp(struct gigaset_capi_ctr *iif,
struct gigaset_capi_appl *ap,
struct sk_buff *skb)
{
- dump_rawmsg(DEBUG_LLDATA, __func__, skb->data);
+ dump_rawmsg(DEBUG_MCMD, __func__, skb->data);
dev_kfree_skb_any(skb);
}

--
1.6.5.3.298.g39add