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authorHolger Freyther <zecke@selfish.org>2009-06-06 13:54:35 +0000
committerHolger Freyther <zecke@selfish.org>2009-06-06 13:54:35 +0000
commit7c19f74084f9eaa4565d34af405d3526e3bbc27b (patch)
tree43f4fcfa091f82df633d824197772bdd8806b58a /include/openbsc
parentc7b86f90119ef70e4b26df689da6026c67f5d4c4 (diff)
lchan: Handle the abnormal case of channel getting closed
The abnormal case is that lchan_free ist getting called due a RSL_MT_CHAN_REL_ACK in the RSL but the refcount of this channel is not zero. This means that some "logical operation" is still going on that needs to be cancelled. Instead of always queuing up all operations in the struct gsm_lchan use the signal framework to inform higher layers about this abnormal case. In gsm_04_08.c a signal handler is installed and in the abnormal case the location updating request operation is freed.
Diffstat (limited to 'include/openbsc')
-rw-r--r--include/openbsc/signal.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/openbsc/signal.h b/include/openbsc/signal.h
index c2cf46a2..4a583f68 100644
--- a/include/openbsc/signal.h
+++ b/include/openbsc/signal.h
@@ -37,6 +37,7 @@ enum signal_subsystems {
SS_SMS,
SS_ABISIP,
SS_NM,
+ SS_LCHAN,
};
/* SS_PAGING signals */
@@ -55,6 +56,16 @@ enum signal_nm {
S_NM_FAIL_REP, /* GSM 12.21 failure event report */
};
+/* SS_LCHAN signals */
+enum signal_lchan {
+ /*
+ * The lchan got freed with an use_count != 0 and error
+ * recovery needs to be carried out from within the
+ * signal handler.
+ */
+ S_LCHAN_UNEXPECTED_RELEASE,
+};
+
typedef int signal_cbfn(unsigned int subsys, unsigned int signal,
void *handler_data, void *signal_data);