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smb3: add trace point for oplock not found 

In order to debug problems with server potentially
sending us an oplock that we don't recognize (or a race
with close and oplock break) it would be helpful to have
a dynamic trace point for this case.  New tracepoint
is called trace_smb3_oplock_not_found

Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Steve French 2022-05-22 00:41:41 -05:00
parent 2b058acecf
commit 35a2b533a2
2 changed files with 5 additions and 0 deletions
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4
fs/cifs/smb2misc.c
View File

@ -732,6 +732,10 @@ smb2_is_valid_oplock_break(char *buffer, struct TCP_Server_Info *server)
}
spin_unlock(&cifs_tcp_ses_lock);
cifs_dbg(FYI, "No file id matched, oplock break ignored\n");
trace_smb3_oplock_not_found(0 /* no xid */, rsp->PersistentFid,
le32_to_cpu(rsp->hdr.Id.SyncId.TreeId),
le64_to_cpu(rsp->hdr.SessionId));
return true;
}

1
fs/cifs/trace.h
View File

@ -158,6 +158,7 @@ DEFINE_SMB3_FD_EVENT(flush_enter);
DEFINE_SMB3_FD_EVENT(flush_done);
DEFINE_SMB3_FD_EVENT(close_enter);
DEFINE_SMB3_FD_EVENT(close_done);
DEFINE_SMB3_FD_EVENT(oplock_not_found);
DECLARE_EVENT_CLASS(smb3_fd_err_class,
TP_PROTO(unsigned int xid,