smb3: Add tracepoints for read, write and query_dir enter

Allows tracing begin (not just completion) of read, write
and query_dir which may be helpful in finding slow requests
and other timing information

Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>

diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 965c4c7..ec9abe2 100644 (file)
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -3142,6 +3142,11 @@ smb2_new_read_req(void **buf, unsigned int *total_len,
        req->MinimumCount = 0;
        req->Length = cpu_to_le32(io_parms->length);
        req->Offset = cpu_to_le64(io_parms->offset);
+
+       trace_smb3_read_enter(0 /* xid */,
+                       io_parms->persistent_fid,
+                       io_parms->tcon->tid, io_parms->tcon->ses->Suid,
+                       io_parms->offset, io_parms->length);
 #ifdef CONFIG_CIFS_SMB_DIRECT
        /*
         * If we want to do a RDMA write, fill in and append
@@ -3541,6 +3546,9 @@ smb2_async_writev(struct cifs_writedata *wdata,
        req->DataOffset = cpu_to_le16(
                                offsetof(struct smb2_write_req, Buffer));
        req->RemainingBytes = 0;
+
+       trace_smb3_write_enter(0 /* xid */, wdata->cfile->fid.persistent_fid,
+               tcon->tid, tcon->ses->Suid, wdata->offset, wdata->bytes);
 #ifdef CONFIG_CIFS_SMB_DIRECT
        /*
         * If we want to do a server RDMA read, fill in and append
@@ -3688,6 +3696,10 @@ SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
                                offsetof(struct smb2_write_req, Buffer));
        req->RemainingBytes = 0;
 
+       trace_smb3_write_enter(xid, io_parms->persistent_fid,
+               io_parms->tcon->tid, io_parms->tcon->ses->Suid,
+               io_parms->offset, io_parms->length);
+
        iov[0].iov_base = (char *)req;
        /* 1 for Buffer */
        iov[0].iov_len = total_len - 1;
@@ -3850,6 +3862,9 @@ SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
        rqst.rq_iov = iov;
        rqst.rq_nvec = 2;
 
+       trace_smb3_query_dir_enter(xid, persistent_fid, tcon->tid,
+                       tcon->ses->Suid, index, output_size);
+
        rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
        cifs_small_buf_release(req);
        rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base;

diff --git a/fs/cifs/trace.h b/fs/cifs/trace.h
index bf4f43f..660176e 100644 (file)
--- a/fs/cifs/trace.h
+++ b/fs/cifs/trace.h
@@ -101,6 +101,9 @@ DEFINE_EVENT(smb3_rw_done_class, smb3_##name,   \
                __u32   len),                   \
        TP_ARGS(xid, fid, tid, sesid, offset, len))
 
+DEFINE_SMB3_RW_DONE_EVENT(write_enter);
+DEFINE_SMB3_RW_DONE_EVENT(read_enter);
+DEFINE_SMB3_RW_DONE_EVENT(query_dir_enter);
 DEFINE_SMB3_RW_DONE_EVENT(write_done);
 DEFINE_SMB3_RW_DONE_EVENT(read_done);
 DEFINE_SMB3_RW_DONE_EVENT(query_dir_done);