@@ -181,4 +181,6 @@ enum skb_drop_reason {
SKB_DR_SET(name, reason); \
} while (0)
+extern const char * const drop_reasons[];
+
#endif
@@ -9,92 +9,6 @@
#include <linux/netdevice.h>
#include <linux/tracepoint.h>
-#define TRACE_SKB_DROP_REASON \
- EM(SKB_DROP_REASON_NOT_SPECIFIED, NOT_SPECIFIED) \
- EM(SKB_DROP_REASON_NO_SOCKET, NO_SOCKET) \
- EM(SKB_DROP_REASON_PKT_TOO_SMALL, PKT_TOO_SMALL) \
- EM(SKB_DROP_REASON_TCP_CSUM, TCP_CSUM) \
- EM(SKB_DROP_REASON_SOCKET_FILTER, SOCKET_FILTER) \
- EM(SKB_DROP_REASON_UDP_CSUM, UDP_CSUM) \
- EM(SKB_DROP_REASON_NETFILTER_DROP, NETFILTER_DROP) \
- EM(SKB_DROP_REASON_OTHERHOST, OTHERHOST) \
- EM(SKB_DROP_REASON_IP_CSUM, IP_CSUM) \
- EM(SKB_DROP_REASON_IP_INHDR, IP_INHDR) \
- EM(SKB_DROP_REASON_IP_RPFILTER, IP_RPFILTER) \
- EM(SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST, \
- UNICAST_IN_L2_MULTICAST) \
- EM(SKB_DROP_REASON_XFRM_POLICY, XFRM_POLICY) \
- EM(SKB_DROP_REASON_IP_NOPROTO, IP_NOPROTO) \
- EM(SKB_DROP_REASON_SOCKET_RCVBUFF, SOCKET_RCVBUFF) \
- EM(SKB_DROP_REASON_PROTO_MEM, PROTO_MEM) \
- EM(SKB_DROP_REASON_TCP_MD5NOTFOUND, TCP_MD5NOTFOUND) \
- EM(SKB_DROP_REASON_TCP_MD5UNEXPECTED, \
- TCP_MD5UNEXPECTED) \
- EM(SKB_DROP_REASON_TCP_MD5FAILURE, TCP_MD5FAILURE) \
- EM(SKB_DROP_REASON_SOCKET_BACKLOG, SOCKET_BACKLOG) \
- EM(SKB_DROP_REASON_TCP_FLAGS, TCP_FLAGS) \
- EM(SKB_DROP_REASON_TCP_ZEROWINDOW, TCP_ZEROWINDOW) \
- EM(SKB_DROP_REASON_TCP_OLD_DATA, TCP_OLD_DATA) \
- EM(SKB_DROP_REASON_TCP_OVERWINDOW, TCP_OVERWINDOW) \
- EM(SKB_DROP_REASON_TCP_OFOMERGE, TCP_OFOMERGE) \
- EM(SKB_DROP_REASON_TCP_OFO_DROP, TCP_OFO_DROP) \
- EM(SKB_DROP_REASON_TCP_RFC7323_PAWS, TCP_RFC7323_PAWS) \
- EM(SKB_DROP_REASON_TCP_INVALID_SEQUENCE, \
- TCP_INVALID_SEQUENCE) \
- EM(SKB_DROP_REASON_TCP_RESET, TCP_RESET) \
- EM(SKB_DROP_REASON_TCP_INVALID_SYN, TCP_INVALID_SYN) \
- EM(SKB_DROP_REASON_TCP_CLOSE, TCP_CLOSE) \
- EM(SKB_DROP_REASON_TCP_FASTOPEN, TCP_FASTOPEN) \
- EM(SKB_DROP_REASON_TCP_OLD_ACK, TCP_OLD_ACK) \
- EM(SKB_DROP_REASON_TCP_TOO_OLD_ACK, TCP_TOO_OLD_ACK) \
- EM(SKB_DROP_REASON_TCP_ACK_UNSENT_DATA, \
- TCP_ACK_UNSENT_DATA) \
- EM(SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE, \
- TCP_OFO_QUEUE_PRUNE) \
- EM(SKB_DROP_REASON_IP_OUTNOROUTES, IP_OUTNOROUTES) \
- EM(SKB_DROP_REASON_BPF_CGROUP_EGRESS, \
- BPF_CGROUP_EGRESS) \
- EM(SKB_DROP_REASON_IPV6DISABLED, IPV6DISABLED) \
- EM(SKB_DROP_REASON_NEIGH_CREATEFAIL, NEIGH_CREATEFAIL) \
- EM(SKB_DROP_REASON_NEIGH_FAILED, NEIGH_FAILED) \
- EM(SKB_DROP_REASON_NEIGH_QUEUEFULL, NEIGH_QUEUEFULL) \
- EM(SKB_DROP_REASON_NEIGH_DEAD, NEIGH_DEAD) \
- EM(SKB_DROP_REASON_TC_EGRESS, TC_EGRESS) \
- EM(SKB_DROP_REASON_QDISC_DROP, QDISC_DROP) \
- EM(SKB_DROP_REASON_CPU_BACKLOG, CPU_BACKLOG) \
- EM(SKB_DROP_REASON_XDP, XDP) \
- EM(SKB_DROP_REASON_TC_INGRESS, TC_INGRESS) \
- EM(SKB_DROP_REASON_UNHANDLED_PROTO, UNHANDLED_PROTO) \
- EM(SKB_DROP_REASON_SKB_CSUM, SKB_CSUM) \
- EM(SKB_DROP_REASON_SKB_GSO_SEG, SKB_GSO_SEG) \
- EM(SKB_DROP_REASON_SKB_UCOPY_FAULT, SKB_UCOPY_FAULT) \
- EM(SKB_DROP_REASON_DEV_HDR, DEV_HDR) \
- EM(SKB_DROP_REASON_DEV_READY, DEV_READY) \
- EM(SKB_DROP_REASON_FULL_RING, FULL_RING) \
- EM(SKB_DROP_REASON_NOMEM, NOMEM) \
- EM(SKB_DROP_REASON_HDR_TRUNC, HDR_TRUNC) \
- EM(SKB_DROP_REASON_TAP_FILTER, TAP_FILTER) \
- EM(SKB_DROP_REASON_TAP_TXFILTER, TAP_TXFILTER) \
- EM(SKB_DROP_REASON_ICMP_CSUM, ICMP_CSUM) \
- EM(SKB_DROP_REASON_INVALID_PROTO, INVALID_PROTO) \
- EM(SKB_DROP_REASON_IP_INADDRERRORS, IP_INADDRERRORS) \
- EM(SKB_DROP_REASON_IP_INNOROUTES, IP_INNOROUTES) \
- EM(SKB_DROP_REASON_PKT_TOO_BIG, PKT_TOO_BIG) \
- EMe(SKB_DROP_REASON_MAX, MAX)
-
-#undef EM
-#undef EMe
-
-#define EM(a, b) TRACE_DEFINE_ENUM(a);
-#define EMe(a, b) TRACE_DEFINE_ENUM(a);
-
-TRACE_SKB_DROP_REASON
-
-#undef EM
-#undef EMe
-#define EM(a, b) { a, #b },
-#define EMe(a, b) { a, #b }
-
/*
* Tracepoint for free an sk_buff:
*/
@@ -121,8 +35,7 @@ TRACE_EVENT(kfree_skb,
TP_printk("skbaddr=%p protocol=%u location=%p reason: %s",
__entry->skbaddr, __entry->protocol, __entry->location,
- __print_symbolic(__entry->reason,
- TRACE_SKB_DROP_REASON))
+ drop_reasons[__entry->reason])
);
TRACE_EVENT(consume_skb,
new file mode 100644
@@ -0,0 +1 @@
+dropreason_str.h
\ No newline at end of file
@@ -39,3 +39,17 @@ obj-$(CONFIG_NET_SOCK_MSG) += skmsg.o
obj-$(CONFIG_BPF_SYSCALL) += sock_map.o
obj-$(CONFIG_BPF_SYSCALL) += bpf_sk_storage.o
obj-$(CONFIG_OF) += of_net.o
+
+clean-files := dropreason_str.h
+
+quiet_cmd_dropreason_str = GEN $@
+cmd_dropreason_str = echo '\n\#define __DEFINE_SKB_DROP_REASON(FN) \' > $@;\
+ sed -e '/enum skb_drop_reason {/,/}/!d' $< | \
+ awk -F ',' '/SKB_DROP_REASON_/{printf " FN(%s) \\\n", substr($$1, 18)}' >> $@;\
+ echo '' >> $@
+
+$(obj)/dropreason_str.h: $(srctree)/include/linux/dropreason.h
+ $(call cmd,dropreason_str)
+
+$(obj)/skbuff.o: $(obj)/dropreason_str.h
+
@@ -48,19 +48,6 @@
static int trace_state = TRACE_OFF;
static bool monitor_hw;
-#undef EM
-#undef EMe
-
-#define EM(a, b) [a] = #b,
-#define EMe(a, b) [a] = #b
-
-/* drop_reasons is used to translate 'enum skb_drop_reason' to string,
- * which is reported to user space.
- */
-static const char * const drop_reasons[] = {
- TRACE_SKB_DROP_REASON
-};
-
/* net_dm_mutex
*
* An overall lock guarding every operation coming from userspace.
@@ -82,6 +82,7 @@
#include "dev.h"
#include "sock_destructor.h"
+#include "dropreason_str.h"
struct kmem_cache *skbuff_head_cache __ro_after_init;
static struct kmem_cache *skbuff_fclone_cache __ro_after_init;
@@ -91,6 +92,17 @@ static struct kmem_cache *skbuff_ext_cache __ro_after_init;
int sysctl_max_skb_frags __read_mostly = MAX_SKB_FRAGS;
EXPORT_SYMBOL(sysctl_max_skb_frags);
+/* drop_reasons is used to translate 'enum skb_drop_reason' to string,
+ * which is reported to user space.
+ */
+const char * const drop_reasons[] = {
+#undef FN
+#define FN(name) [SKB_DROP_REASON_##name] = #name,
+ __DEFINE_SKB_DROP_REASON(FN)
+#undef FN
+};
+EXPORT_SYMBOL(drop_reasons);
+
/**
* skb_panic - private function for out-of-line support
* @skb: buffer