smb3: add dynamic tracepoint for reflink errors

There are cases where debugging clone_range ("smb2_duplicate_extents"
function) and in the future copy_range ("smb2_copychunk_range") can
be helpful. Add dynamic trace points for any errors in clone, and
a followon patch will add them for copychunk.

  "trace-cmd record -e smb3_clone_err"

Reviewed-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

diff --git a/fs/smb/client/smb2ops.c b/fs/smb/client/smb2ops.c
index 7fe59235f09016bd19f13bddb94ff0603cebe8aa..1539463285ee48658fea9a88af6ed584b7cbf1b7 100644 (file)
--- a/fs/smb/client/smb2ops.c
+++ b/fs/smb/client/smb2ops.c
@@ -2075,6 +2075,11 @@ smb2_duplicate_extents(const unsigned int xid,
                cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
 
 duplicate_extents_out:
+       if (rc)
+               trace_smb3_clone_err(xid, srcfile->fid.volatile_fid,
+                                    trgtfile->fid.volatile_fid,
+                                    tcon->tid, tcon->ses->Suid, src_off,
+                                    dest_off, len, rc);
        return rc;
 }
 

diff --git a/fs/smb/client/trace.h b/fs/smb/client/trace.h
index 36d5295c2a6f92f1e26acbd0d2b94226b0c46452..b027282d6db763f1d79d2fd0b5c4cf4a827a1a27 100644 (file)
--- a/fs/smb/client/trace.h
+++ b/fs/smb/client/trace.h
@@ -206,6 +206,63 @@ DEFINE_SMB3_OTHER_ERR_EVENT(query_dir_err);
 DEFINE_SMB3_OTHER_ERR_EVENT(zero_err);
 DEFINE_SMB3_OTHER_ERR_EVENT(falloc_err);
 
+/*
+ * For logging errors in reflink and copy_range ops e.g. smb2_copychunk_range
+ * and smb2_duplicate_extents
+ */
+DECLARE_EVENT_CLASS(smb3_copy_range_err_class,
+       TP_PROTO(unsigned int xid,
+               __u64   src_fid,
+               __u64   target_fid,
+               __u32   tid,
+               __u64   sesid,
+               __u64   src_offset,
+               __u64   target_offset,
+               __u32   len,
+               int     rc),
+       TP_ARGS(xid, src_fid, target_fid, tid, sesid, src_offset, target_offset, len, rc),
+       TP_STRUCT__entry(
+               __field(unsigned int, xid)
+               __field(__u64, src_fid)
+               __field(__u64, target_fid)
+               __field(__u32, tid)
+               __field(__u64, sesid)
+               __field(__u64, src_offset)
+               __field(__u64, target_offset)
+               __field(__u32, len)
+               __field(int, rc)
+       ),
+       TP_fast_assign(
+               __entry->xid = xid;
+               __entry->src_fid = src_fid;
+               __entry->target_fid = target_fid;
+               __entry->tid = tid;
+               __entry->sesid = sesid;
+               __entry->src_offset = src_offset;
+               __entry->target_offset = target_offset;
+               __entry->len = len;
+               __entry->rc = rc;
+       ),
+       TP_printk("\txid=%u sid=0x%llx tid=0x%x source fid=0x%llx source offset=0x%llx target fid=0x%llx target offset=0x%llx len=0x%x rc=%d",
+               __entry->xid, __entry->sesid, __entry->tid, __entry->target_fid,
+               __entry->src_offset, __entry->target_fid, __entry->target_offset, __entry->len, __entry->rc)
+)
+
+#define DEFINE_SMB3_COPY_RANGE_ERR_EVENT(name) \
+DEFINE_EVENT(smb3_copy_range_err_class, smb3_##name, \
+       TP_PROTO(unsigned int xid,              \
+               __u64   src_fid,                \
+               __u64   target_fid,             \
+               __u32   tid,                    \
+               __u64   sesid,                  \
+               __u64   src_offset,             \
+               __u64   target_offset,          \
+               __u32   len,                    \
+               int     rc),                    \
+       TP_ARGS(xid, src_fid, target_fid, tid, sesid, src_offset, target_offset, len, rc))
+
+DEFINE_SMB3_COPY_RANGE_ERR_EVENT(clone_err);
+/* TODO: Add SMB3_COPY_RANGE_ERR_EVENT(copychunk_err) */
 
 /* For logging successful read or write */
 DECLARE_EVENT_CLASS(smb3_rw_done_class,