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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 2/7] NFSv4.2 add tracepoints to FALLOCATE and DEALLOCATE
Date:   Mon, 18 Oct 2021 18:03:09 -0400
Message-Id: <20211018220314.85115-3-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 the FALLOCATE/DEALLOCATE operations.

Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
---
 fs/nfs/nfs42proc.c |  4 ++++
 fs/nfs/nfs4trace.h | 57 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 61 insertions(+)

diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c
index 87c0dcb8823b..c36824888601 100644
--- a/fs/nfs/nfs42proc.c
+++ b/fs/nfs/nfs42proc.c
@@ -83,6 +83,10 @@ static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
 		status = nfs_post_op_update_inode_force_wcc(inode,
 							    res.falloc_fattr);
 
+	if (msg->rpc_proc == &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE])
+		trace_nfs4_fallocate(inode, &args, status);
+	else
+		trace_nfs4_deallocate(inode, &args, status);
 	kfree(res.falloc_fattr);
 	return status;
 }
diff --git a/fs/nfs/nfs4trace.h b/fs/nfs/nfs4trace.h
index 81dcbfca7f74..ba338ee4a82b 100644
--- a/fs/nfs/nfs4trace.h
+++ b/fs/nfs/nfs4trace.h
@@ -2483,6 +2483,63 @@ TRACE_EVENT(nfs4_llseek,
 		)
 );
 
+DECLARE_EVENT_CLASS(nfs4_sparse_event,
+		TP_PROTO(
+			const struct inode *inode,
+			const struct nfs42_falloc_args *args,
+			int error
+		),
+
+		TP_ARGS(inode, args, error),
+
+		TP_STRUCT__entry(
+			__field(unsigned long, error)
+			__field(loff_t, offset)
+			__field(loff_t, len)
+			__field(dev_t, dev)
+			__field(u32, fhandle)
+			__field(u64, fileid)
+			__field(int, stateid_seq)
+			__field(u32, stateid_hash)
+		),
+
+		TP_fast_assign(
+			__entry->error = error < 0 ? -error : 0;
+			__entry->offset = args->falloc_offset;
+			__entry->len = args->falloc_length;
+			__entry->dev = inode->i_sb->s_dev;
+			__entry->fileid = NFS_FILEID(inode);
+			__entry->fhandle = nfs_fhandle_hash(NFS_FH(inode));
+			__entry->stateid_seq =
+				be32_to_cpu(args->falloc_stateid.seqid);
+			__entry->stateid_hash =
+				nfs_stateid_hash(&args->falloc_stateid);
+		),
+
+		TP_printk(
+			"error=%ld (%s) fileid=%02x:%02x:%llu fhandle=0x%08x "
+			"stateid=%d:0x%08x offset=%llu len=%llu",
+			-__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,
+			(long long)__entry->offset,
+			(long long)__entry->len
+		)
+);
+#define DEFINE_NFS4_SPARSE_EVENT(name) \
+	DEFINE_EVENT(nfs4_sparse_event, name, \
+			TP_PROTO( \
+				const struct inode *inode, \
+				const struct nfs42_falloc_args *args, \
+				int error \
+			), \
+			TP_ARGS(inode, args, error))
+DEFINE_NFS4_SPARSE_EVENT(nfs4_fallocate);
+DEFINE_NFS4_SPARSE_EVENT(nfs4_deallocate);
+
 #endif /* CONFIG_NFS_V4_1 */
 
 #endif /* _TRACE_NFS4_H */
-- 
2.27.0