From 020eec5f712ffb4254233490076cc21600b810db Mon Sep 17 00:00:00 2001 From: Steve French Date: Wed, 1 Aug 2018 16:38:07 -0500 Subject: smb3: add tracepoint for slow responses If responses take longer than one second from the server, we can optionally log them to dmesg in current cifs.ko code (CONFIG_CIFS_STATS2 must be configured and a /proc/fs/cifs/cifsFYI flag must be set), but can be more useful to log these via ftrace (tracepoint is smb3_slow_rsp) which is easier and more granular (still requires CONFIG_CIFS_STATS2 to be configured in the build though). Signed-off-by: Steve French Reviewed-by: Pavel Shilovsky --- fs/cifs/trace.h | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) (limited to 'fs/cifs/trace.h') diff --git a/fs/cifs/trace.h b/fs/cifs/trace.h index 6b50b57e2416..d4aed5217a56 100644 --- a/fs/cifs/trace.h +++ b/fs/cifs/trace.h @@ -283,6 +283,43 @@ DEFINE_EVENT(smb3_cmd_done_class, smb3_##name, \ DEFINE_SMB3_CMD_DONE_EVENT(cmd_done); DEFINE_SMB3_CMD_DONE_EVENT(ses_expired); +DECLARE_EVENT_CLASS(smb3_mid_class, + TP_PROTO(__u16 cmd, + __u64 mid, + __u32 pid, + unsigned long when_sent, + unsigned long when_received), + TP_ARGS(cmd, mid, pid, when_sent, when_received), + TP_STRUCT__entry( + __field(__u16, cmd) + __field(__u64, mid) + __field(__u32, pid) + __field(unsigned long, when_sent) + __field(unsigned long, when_received) + ), + TP_fast_assign( + __entry->cmd = cmd; + __entry->mid = mid; + __entry->pid = pid; + __entry->when_sent = when_sent; + __entry->when_received = when_received; + ), + TP_printk("\tcmd=%u mid=%llu pid=%u, when_sent=%lu when_rcv=%lu", + __entry->cmd, __entry->mid, __entry->pid, __entry->when_sent, + __entry->when_received) +) + +#define DEFINE_SMB3_MID_EVENT(name) \ +DEFINE_EVENT(smb3_mid_class, smb3_##name, \ + TP_PROTO(__u16 cmd, \ + __u64 mid, \ + __u32 pid, \ + unsigned long when_sent, \ + unsigned long when_received), \ + TP_ARGS(cmd, mid, pid, when_sent, when_received)) + +DEFINE_SMB3_MID_EVENT(slow_rsp); + DECLARE_EVENT_CLASS(smb3_exit_err_class, TP_PROTO(unsigned int xid, const char *func_name, -- cgit v1.2.3