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From:   Olga Kornievskaia <olga.kornievskaia@gmail.com>
To:     trond.myklebust@hammerspace.com, anna.schumaker@netapp.com,
        steved@redhat.com
Cc:     linux-nfs@vger.kernel.org
Subject: [PATCH 6/7] NFSv4.2 add tracepoint to COPY_NOTIFY
Date:   Mon, 18 Oct 2021 18:03:13 -0400
Message-Id: <20211018220314.85115-7-olga.kornievskaia@gmail.com>
In-Reply-To: <20211018220314.85115-1-olga.kornievskaia@gmail.com>
References: <20211018220314.85115-1-olga.kornievskaia@gmail.com>
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From: Olga Kornievskaia <kolga@netapp.com>

Add a tracepoint to COPY_NOTIFY operation.

Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
---
 fs/nfs/nfs42proc.c |  1 +
 fs/nfs/nfs4trace.h | 50 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 51 insertions(+)

diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c
index d3d9ea71702f..7c7399b10050 100644
--- a/fs/nfs/nfs42proc.c
+++ b/fs/nfs/nfs42proc.c
@@ -603,6 +603,7 @@ static int _nfs42_proc_copy_notify(struct file *src, struct file *dst,
 
 	status = nfs4_call_sync(src_server->client, src_server, &msg,
 				&args->cna_seq_args, &res->cnr_seq_res, 0);
+	trace_nfs4_copy_notify(file_inode(src), args, res, status);
 	if (status == -ENOTSUPP)
 		src_server->caps &= ~NFS_CAP_COPY_NOTIFY;
 
diff --git a/fs/nfs/nfs4trace.h b/fs/nfs/nfs4trace.h
index 33f52d486528..2741e12746b2 100644
--- a/fs/nfs/nfs4trace.h
+++ b/fs/nfs/nfs4trace.h
@@ -2764,6 +2764,56 @@ TRACE_EVENT(nfs4_cb_offload,
 		)
 );
 
+TRACE_EVENT(nfs4_copy_notify,
+		TP_PROTO(
+			const struct inode *inode,
+			const struct nfs42_copy_notify_args *args,
+			const struct nfs42_copy_notify_res *res,
+			int error
+		),
+
+		TP_ARGS(inode, args, res, error),
+
+		TP_STRUCT__entry(
+			__field(unsigned long, error)
+			__field(u32, fhandle)
+			__field(u32, fileid)
+			__field(dev_t, dev)
+			__field(int, stateid_seq)
+			__field(u32, stateid_hash)
+			__field(int, res_stateid_seq)
+			__field(u32, res_stateid_hash)
+		),
+
+		TP_fast_assign(
+			const struct nfs_inode *nfsi = NFS_I(inode);
+
+			__entry->fileid = nfsi->fileid;
+			__entry->dev = inode->i_sb->s_dev;
+			__entry->fhandle = nfs_fhandle_hash(args->cna_src_fh);
+			__entry->error = error < 0 ? -error : 0;
+			__entry->stateid_seq =
+				be32_to_cpu(args->cna_src_stateid.seqid);
+			__entry->stateid_hash =
+				nfs_stateid_hash(&args->cna_src_stateid);
+			__entry->res_stateid_seq = error < 0 ? 0 :
+				be32_to_cpu(res->cnr_stateid.seqid);
+			__entry->res_stateid_hash = error < 0 ? 0 :
+				nfs_stateid_hash(&res->cnr_stateid);
+		),
+
+		TP_printk(
+			"error=%ld (%s) fileid=%02x:%02x:%llu fhandle=0x%08x "
+			"stateid=%d:0x%08x res_stateid=%d:0x%08x",
+			-__entry->error,
+			show_nfsv4_errors(__entry->error),
+			MAJOR(__entry->dev), MINOR(__entry->dev),
+			(unsigned long long)__entry->fileid,
+			__entry->fhandle,
+			__entry->stateid_seq, __entry->stateid_hash,
+			__entry->res_stateid_seq, __entry->res_stateid_hash
+		)
+);
 #endif /* CONFIG_NFS_V4_1 */
 
 #endif /* _TRACE_NFS4_H */
-- 
2.27.0